diff --git a/CITATION.cff b/CITATION.cff
index 381ba9f..3b9e84a 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -5,7 +5,7 @@ authors:
   given-names: "Otto"
   orcid: "https://orcid.org/0000-0002-3363-9287"
 title: "Pyreadstat"
-version: 1.2.0
+version: 1.2.1
 doi: 10.5281/zenodo.6612282
 date-released: 2018-09-24
 url: "https://github.com/Roche/pyreadstat"
diff --git a/README.md b/README.md
index f0050a0..9829335 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,7 @@ the original applications in this regard.**
     - [Missing Values](#missing-values)
       + [SPSS](#spss)
       + [SAS and STATA](#sas-and-stata)
+    - [Reading datetime and date columns](#reading-datetime-and-date-columns)
     - [Other options](#other-options)
   + [More writing options](#more-writing-options)
     - [File specific options](#file-specific-options)
@@ -637,6 +638,36 @@ This is a list listing all user defined missing values.
 User defined missing values are currently not supported for file types other than sas7bdat,
 sas7bcat and dta.
 
+#### Reading datetime and date columns
+
+SAS, SPSS and STATA represent datetime, date and other similar concepts as a numeric column and then applies a 
+display format on top. Roughly speaking, internally there are two possible representations: one for concepts with a day or lower 
+granularity (date, week, quarter, year, etc.) and those with a higher granularity than a day (datetime, time, hour, etc).
+The first group is suceptible to be converted to a python date object and the second to a python datetime object. 
+
+Pyreadstat attempts to read columns with datetime, date and time formats that are convertible
+to python datetime, date and time objects automatically. However there are other formats that are not fully convertible to
+any of these formats, for example SAS "YEAR" (displaying only the year), "MMYY" (displaying only month and year), etc.
+Because there are too many of these formats and these keep changing, it is not possible to implement a rule for each of
+those, therefore these columns are not transformed and the user will obtain a numeric column. 
+
+In order to cope with this issue, there are two options for each reader function: extra\_datetime\_formats and
+ extra\_date\_formats that allow the user to
+pass these datetime or date formats, to transform the numeric values into datetime or date python objects. Then, the user
+can format those columns appropiately; for example extracting the year only to an integer column in the case of 'YEAR' or
+formatting it to a string 'YYYY-MM' in the case of 'MMYY'. The choice between datetime or date format depends on the granularity
+of the data as explained above.
+
+This arguments are also useful in the case you have a valid datetime, date or time format that is currently not recognized in pyreadstat.
+In those cases, feel free to file an issue to ask those to be added to the list, in the meantime you can use these arguments to do
+the conversion.
+
+```python
+import pyreadstat
+
+df, meta = pyreadstat.read_sas7bdat('/path/to/a/file.sas7bdat', extra_date_formats=["YEAR", "MMYY"])
+```
+
 #### Other options
 
 You can set the encoding of the original file manually. The encoding must be a [iconv-compatible encoding](https://gist.github.com/hakre/4188459).
diff --git a/change_log.md b/change_log.md
index 50dcfb0..6a70c4c 100644
--- a/change_log.md
+++ b/change_log.md
@@ -1,3 +1,11 @@
+# 1.2.1 (github, pypi and conda 2023.02.22)
+* Readstat source updated to version 1.1.9
+* introduced recognition for pandas datatype datetime64[ns, UTC] and other datetime64 types when writing, 
+  so that this column type gets correctly written as datetime
+* introduced extra_datetime_formats and extra_date_formats arguments for read functions, cleaned the list of 
+  sas date, datetime and time formats to exclude those not directly convertible to python objects
+* improved performace of writer when there are datetime64 columns
+
 # 1.2.0 (github, pypi and conda 2022.10.25)
 * Fixed #206, #207
 * added pyproject.toml
diff --git a/docs/_build/doctrees/environment.pickle b/docs/_build/doctrees/environment.pickle
index 93f754a..61b86a2 100644
Binary files a/docs/_build/doctrees/environment.pickle and b/docs/_build/doctrees/environment.pickle differ
diff --git a/docs/_build/doctrees/index.doctree b/docs/_build/doctrees/index.doctree
index 3f1ef6c..a25b445 100644
Binary files a/docs/_build/doctrees/index.doctree and b/docs/_build/doctrees/index.doctree differ
diff --git a/docs/_build/html/.buildinfo b/docs/_build/html/.buildinfo
index ca965f6..d41041b 100644
--- a/docs/_build/html/.buildinfo
+++ b/docs/_build/html/.buildinfo
@@ -1,4 +1,4 @@
 # Sphinx build info version 1
 # This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done.
-config: d1957ba96adbb9536e51c852822e9ccb
+config: dc63e4405a0437fb9efe8c4f5ffb3848
 tags: 645f666f9bcd5a90fca523b33c5a78b7
diff --git a/docs/_build/html/_static/documentation_options.js b/docs/_build/html/_static/documentation_options.js
index 5be98c4..120e3ee 100644
--- a/docs/_build/html/_static/documentation_options.js
+++ b/docs/_build/html/_static/documentation_options.js
@@ -1,6 +1,6 @@
 var DOCUMENTATION_OPTIONS = {
     URL_ROOT: document.getElementById("documentation_options").getAttribute('data-url_root'),
-    VERSION: '1.2.0',
+    VERSION: '1.2.1',
     LANGUAGE: 'None',
     COLLAPSE_INDEX: false,
     BUILDER: 'html',
diff --git a/docs/_build/html/genindex.html b/docs/_build/html/genindex.html
index 6382887..459099f 100644
--- a/docs/_build/html/genindex.html
+++ b/docs/_build/html/genindex.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Index &mdash; pyreadstat 1.2.0 documentation</title>
+  <title>Index &mdash; pyreadstat 1.2.1 documentation</title>
       <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
   <!--[if lt IE 9]>
diff --git a/docs/_build/html/index.html b/docs/_build/html/index.html
index 6d6d47f..ffcb200 100644
--- a/docs/_build/html/index.html
+++ b/docs/_build/html/index.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
 
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Welcome to pyreadstat’s documentation! &mdash; pyreadstat 1.2.0 documentation</title>
+  <title>Welcome to pyreadstat’s documentation! &mdash; pyreadstat 1.2.1 documentation</title>
       <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
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@@ -154,6 +154,8 @@ <h1>Metadata Object Description<a class="headerlink" href="#metadata-object-desc
 <li><p><strong>output_format</strong> (<em>str</em><em>, </em><em>optional</em>) – one of ‘pandas’ (default) or ‘dict’. If ‘dict’ a dictionary with numpy arrays as values will be returned, the
 user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas
 dataframe is avoided.</p></li>
+<li><p><strong>extra_datetime_formats</strong> (<em>list of str</em><em>, </em><em>optional</em>) – formats to be parsed as python datetime objects</p></li>
+<li><p><strong>extra_date_formats</strong> (<em>list of str</em><em>, </em><em>optional</em>) – formats to be parsed as python date objects</p></li>
 </ul>
 </dd>
 <dt class="field-even">Returns</dt>
@@ -252,6 +254,8 @@ <h1>Metadata Object Description<a class="headerlink" href="#metadata-object-desc
 <li><p><strong>output_format</strong> (<em>str</em><em>, </em><em>optional</em>) – one of ‘pandas’ (default) or ‘dict’. If ‘dict’ a dictionary with numpy arrays as values will be returned, the
 user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas
 dataframe is avoided.</p></li>
+<li><p><strong>extra_datetime_formats</strong> (<em>list of str</em><em>, </em><em>optional</em>) – formats to be parsed as python datetime objects</p></li>
+<li><p><strong>extra_date_formats</strong> (<em>list of str</em><em>, </em><em>optional</em>) – formats to be parsed as python date objects</p></li>
 </ul>
 </dd>
 <dt class="field-even">Returns</dt>
@@ -335,6 +339,8 @@ <h1>Metadata Object Description<a class="headerlink" href="#metadata-object-desc
 <li><p><strong>output_format</strong> (<em>str</em><em>, </em><em>optional</em>) – one of ‘pandas’ (default) or ‘dict’. If ‘dict’ a dictionary with numpy arrays as values will be returned, the
 user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas
 dataframe is avoided.</p></li>
+<li><p><strong>extra_datetime_formats</strong> (<em>list of str</em><em>, </em><em>optional</em>) – formats to be parsed as python datetime objects</p></li>
+<li><p><strong>extra_date_formats</strong> (<em>list of str</em><em>, </em><em>optional</em>) – formats to be parsed as python date objects</p></li>
 </ul>
 </dd>
 <dt class="field-even">Returns</dt>
@@ -384,6 +390,8 @@ <h1>Metadata Object Description<a class="headerlink" href="#metadata-object-desc
 <li><p><strong>output_format</strong> (<em>str</em><em>, </em><em>optional</em>) – one of ‘pandas’ (default) or ‘dict’. If ‘dict’ a dictionary with numpy arrays as values will be returned, the
 user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas
 dataframe is avoided.</p></li>
+<li><p><strong>extra_datetime_formats</strong> (<em>list of str</em><em>, </em><em>optional</em>) – formats to be parsed as python datetime objects</p></li>
+<li><p><strong>extra_date_formats</strong> (<em>list of str</em><em>, </em><em>optional</em>) – formats to be parsed as python date objects</p></li>
 </ul>
 </dd>
 <dt class="field-even">Returns</dt>
@@ -422,6 +430,8 @@ <h1>Metadata Object Description<a class="headerlink" href="#metadata-object-desc
 <li><p><strong>output_format</strong> (<em>str</em><em>, </em><em>optional</em>) – one of ‘pandas’ (default) or ‘dict’. If ‘dict’ a dictionary with numpy arrays as values will be returned, the
 user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas
 dataframe is avoided.</p></li>
+<li><p><strong>extra_datetime_formats</strong> (<em>list of str</em><em>, </em><em>optional</em>) – formats to be parsed as python datetime objects</p></li>
+<li><p><strong>extra_date_formats</strong> (<em>list of str</em><em>, </em><em>optional</em>) – formats to be parsed as python date objects</p></li>
 </ul>
 </dd>
 <dt class="field-even">Returns</dt>
diff --git a/docs/_build/html/py-modindex.html b/docs/_build/html/py-modindex.html
index 827d9ce..897d117 100644
--- a/docs/_build/html/py-modindex.html
+++ b/docs/_build/html/py-modindex.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Python Module Index &mdash; pyreadstat 1.2.0 documentation</title>
+  <title>Python Module Index &mdash; pyreadstat 1.2.1 documentation</title>
       <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
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diff --git a/docs/_build/html/search.html b/docs/_build/html/search.html
index 6ef4325..27fb78c 100644
--- a/docs/_build/html/search.html
+++ b/docs/_build/html/search.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Search &mdash; pyreadstat 1.2.0 documentation</title>
+  <title>Search &mdash; pyreadstat 1.2.1 documentation</title>
       <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
       <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
     
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index ec10567..9d44441 100644
--- a/docs/_build/html/searchindex.js
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diff --git a/docs/conf.py b/docs/conf.py
index 925195e..f4bff67 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -26,7 +26,7 @@
 # The short X.Y version
 version = ''
 # The full version, including alpha/beta/rc tags
-release = '1.2.0'
+release = '1.2.1'
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/pyreadstat/__init__.py b/pyreadstat/__init__.py
index a93ff32..6610098 100644
--- a/pyreadstat/__init__.py
+++ b/pyreadstat/__init__.py
@@ -20,5 +20,5 @@
 from .pyreadstat import read_file_in_chunks, read_file_multiprocessing
 from ._readstat_parser import ReadstatError, metadata_container
 
-__version__ = "1.2.0"
+__version__ = "1.2.1"
 
diff --git a/pyreadstat/_readstat_parser.c b/pyreadstat/_readstat_parser.c
index e696c3f..b562556 100644
--- a/pyreadstat/_readstat_parser.c
+++ b/pyreadstat/_readstat_parser.c
@@ -1470,6 +1470,19 @@ static CYTHON_INLINE PyObject* __Pyx_PyFrozenSet_New(PyObject* it);
 /* PySetContains.proto */
 static CYTHON_INLINE int __Pyx_PySet_ContainsTF(PyObject* key, PyObject* set, int eq);
 
+/* ListExtend.proto */
+static CYTHON_INLINE int __Pyx_PyList_Extend(PyObject* L, PyObject* v) {
+#if CYTHON_COMPILING_IN_CPYTHON
+    PyObject* none = _PyList_Extend((PyListObject*)L, v);
+    if (unlikely(!none))
+        return -1;
+    Py_DECREF(none);
+    return 0;
+#else
+    return PyList_SetSlice(L, PY_SSIZE_T_MAX, PY_SSIZE_T_MAX, v);
+#endif
+}
+
 /* PyObject_GenericGetAttrNoDict.proto */
 #if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
 static CYTHON_INLINE PyObject* __Pyx_PyObject_GenericGetAttrNoDict(PyObject* obj, PyObject* attr_name);
@@ -1762,8 +1775,6 @@ static const char __pyx_k_pd[] = "pd";
 static const char __pyx_k_tC[] = "%tC";
 static const char __pyx_k_tc[] = "%tc";
 static const char __pyx_k_td[] = "%td";
-static const char __pyx_k_DAY[] = "DAY";
-static const char __pyx_k_QTR[] = "QTR";
 static const char __pyx_k_TOD[] = "TOD";
 static const char __pyx_k_chr[] = "chr";
 static const char __pyx_k_doc[] = "__doc__";
@@ -1773,11 +1784,8 @@ static const char __pyx_k_sys[] = "sys";
 static const char __pyx_k_zip[] = "zip";
 static const char __pyx_k_DATE[] = "DATE";
 static const char __pyx_k_HHMM[] = "HHMM";
-static const char __pyx_k_HOUR[] = "HOUR";
 static const char __pyx_k_NULL[] = "NULL";
-static const char __pyx_k_QTRR[] = "QTRR";
 static const char __pyx_k_TIME[] = "TIME";
-static const char __pyx_k_YEAR[] = "YEAR";
 static const char __pyx_k_copy[] = "copy";
 static const char __pyx_k_date[] = "date";
 static const char __pyx_k_dict[] = "dict";
@@ -1799,7 +1807,6 @@ static const char __pyx_k_DTIME[] = "DTIME";
 static const char __pyx_k_EDATE[] = "EDATE";
 static const char __pyx_k_JDATE[] = "JDATE";
 static const char __pyx_k_M8_ns[] = "<M8[ns]";
-static const char __pyx_k_MONTH[] = "MONTH";
 static const char __pyx_k_SDATE[] = "SDATE";
 static const char __pyx_k_TIME5[] = "TIME5";
 static const char __pyx_k_TIME8[] = "TIME8";
@@ -1820,6 +1827,7 @@ static const char __pyx_k_ADATE8[] = "ADATE8";
 static const char __pyx_k_DATE11[] = "DATE11";
 static const char __pyx_k_DATE12[] = "DATE12";
 static const char __pyx_k_DDMMYY[] = "DDMMYY";
+static const char __pyx_k_DTDATE[] = "DTDATE";
 static const char __pyx_k_EDATE8[] = "EDATE8";
 static const char __pyx_k_JDATE5[] = "JDATE5";
 static const char __pyx_k_JDATE7[] = "JDATE7";
@@ -1844,21 +1852,26 @@ static const char __pyx_k_reduce[] = "__reduce__";
 static const char __pyx_k_string[] = "string";
 static const char __pyx_k_tolist[] = "tolist";
 static const char __pyx_k_ADATE10[] = "ADATE10";
+static const char __pyx_k_B8601DA[] = "B8601DA";
+static const char __pyx_k_B8601DN[] = "B8601DN";
+static const char __pyx_k_B8601DT[] = "B8601DT";
+static const char __pyx_k_B8601TM[] = "B8601TM";
 static const char __pyx_k_DDMMYYB[] = "DDMMYYB";
 static const char __pyx_k_DDMMYYC[] = "DDMMYYC";
 static const char __pyx_k_DDMMYYD[] = "DDMMYYD";
 static const char __pyx_k_DDMMYYP[] = "DDMMYYP";
 static const char __pyx_k_DDMMYYS[] = "DDMMYYS";
-static const char __pyx_k_DOWNAME[] = "DOWNAME";
+static const char __pyx_k_E8601DA[] = "E8601DA";
+static const char __pyx_k_E8601DT[] = "E8601DT";
+static const char __pyx_k_E8601TM[] = "E8601TM";
 static const char __pyx_k_EDATE10[] = "EDATE10";
+static const char __pyx_k_MDYAMPM[] = "MDYAMPM";
 static const char __pyx_k_MMDDYYB[] = "MMDDYYB";
 static const char __pyx_k_MMDDYYC[] = "MMDDYYC";
 static const char __pyx_k_MMDDYYD[] = "MMDDYYD";
 static const char __pyx_k_MMDDYYP[] = "MMDDYYP";
 static const char __pyx_k_MMDDYYS[] = "MMDDYYS";
-static const char __pyx_k_MONNAME[] = "MONNAME";
 static const char __pyx_k_SDATE10[] = "SDATE10";
-static const char __pyx_k_WEEKDAY[] = "WEEKDAY";
 static const char __pyx_k_YYMMDDB[] = "YYMMDDB";
 static const char __pyx_k_YYMMDDD[] = "YYMMDDD";
 static const char __pyx_k_YYMMDDN[] = "YYMMDDN";
@@ -1872,13 +1885,18 @@ static const char __pyx_k_prepare[] = "__prepare__";
 static const char __pyx_k_tcHH_MM[] = "%tcHH:MM";
 static const char __pyx_k_tdD_m_Y[] = "%tdD_m_Y";
 static const char __pyx_k_unknown[] = "unknown";
+static const char __pyx_k_DATEAMPM[] = "DATEAMPM";
 static const char __pyx_k_DATETIME[] = "DATETIME";
 static const char __pyx_k_DDMMYYN6[] = "DDMMYYN6";
 static const char __pyx_k_DDMMYYN8[] = "DDMMYYN8";
+static const char __pyx_k_IS8601DA[] = "IS8601DA";
+static const char __pyx_k_IS8601DT[] = "IS8601DT";
+static const char __pyx_k_IS8601TM[] = "IS8601TM";
 static const char __pyx_k_MMDDYYN6[] = "MMDDYYN6";
 static const char __pyx_k_MMDDYYN8[] = "MMDDYYN8";
 static const char __pyx_k_TIME11_2[] = "TIME11.2";
 static const char __pyx_k_TIME20_3[] = "TIME20.3";
+static const char __pyx_k_TIMEAMPM[] = "TIMEAMPM";
 static const char __pyx_k_WEEKDATE[] = "WEEKDATE";
 static const char __pyx_k_WEEKDATX[] = "WEEKDATX";
 static const char __pyx_k_YMDHMS16[] = "YMDHMS16";
@@ -1992,11 +2010,16 @@ static const char __pyx_k_Just_defining_a_custom_exceptio_2[] = "\n    Just defi
 static PyObject *__pyx_n_s_ADATE;
 static PyObject *__pyx_n_s_ADATE10;
 static PyObject *__pyx_n_s_ADATE8;
+static PyObject *__pyx_n_s_B8601DA;
+static PyObject *__pyx_n_s_B8601DN;
+static PyObject *__pyx_n_s_B8601DT;
+static PyObject *__pyx_n_s_B8601TM;
 static PyObject *__pyx_n_s_DATE;
 static PyObject *__pyx_n_s_DATE11;
 static PyObject *__pyx_n_s_DATE12;
 static PyObject *__pyx_n_s_DATE8;
 static PyObject *__pyx_n_s_DATE9;
+static PyObject *__pyx_n_s_DATEAMPM;
 static PyObject *__pyx_n_s_DATETIME;
 static PyObject *__pyx_n_s_DATETIME17;
 static PyObject *__pyx_n_s_DATETIME18;
@@ -2006,7 +2029,6 @@ static PyObject *__pyx_n_s_DATETIME21;
 static PyObject *__pyx_n_s_DATETIME22;
 static PyObject *__pyx_kp_s_DATETIME23_2;
 static PyObject *__pyx_n_s_DATETIME8;
-static PyObject *__pyx_n_s_DAY;
 static PyObject *__pyx_n_s_DDMMYY;
 static PyObject *__pyx_n_s_DDMMYYB;
 static PyObject *__pyx_n_s_DDMMYYB10;
@@ -2020,9 +2042,12 @@ static PyObject *__pyx_n_s_DDMMYYP;
 static PyObject *__pyx_n_s_DDMMYYP10;
 static PyObject *__pyx_n_s_DDMMYYS;
 static PyObject *__pyx_n_s_DDMMYYS10;
-static PyObject *__pyx_n_s_DOWNAME;
+static PyObject *__pyx_n_s_DTDATE;
 static PyObject *__pyx_n_s_DTIME;
 static PyObject *__pyx_n_s_DataFrame;
+static PyObject *__pyx_n_s_E8601DA;
+static PyObject *__pyx_n_s_E8601DT;
+static PyObject *__pyx_n_s_E8601TM;
 static PyObject *__pyx_n_s_EDATE;
 static PyObject *__pyx_n_s_EDATE10;
 static PyObject *__pyx_n_s_EDATE8;
@@ -2030,13 +2055,16 @@ static PyObject *__pyx_kp_s_Failed_convert_C_to_python_value;
 static PyObject *__pyx_kp_s_Failed_to_read_number_of_variabl;
 static PyObject *__pyx_kp_s_File_0_does_not_exist;
 static PyObject *__pyx_n_s_HHMM;
-static PyObject *__pyx_n_s_HOUR;
+static PyObject *__pyx_n_s_IS8601DA;
+static PyObject *__pyx_n_s_IS8601DT;
+static PyObject *__pyx_n_s_IS8601TM;
 static PyObject *__pyx_n_s_JDATE;
 static PyObject *__pyx_n_s_JDATE5;
 static PyObject *__pyx_n_s_JDATE7;
 static PyObject *__pyx_kp_s_Just_defining_a_custom_exceptio;
 static PyObject *__pyx_kp_s_Just_defining_a_custom_exceptio_2;
 static PyObject *__pyx_kp_s_M8_ns;
+static PyObject *__pyx_n_s_MDYAMPM;
 static PyObject *__pyx_n_s_MMDDYY;
 static PyObject *__pyx_n_s_MMDDYYB;
 static PyObject *__pyx_n_s_MMDDYYB10;
@@ -2050,13 +2078,9 @@ static PyObject *__pyx_n_s_MMDDYYP;
 static PyObject *__pyx_n_s_MMDDYYP10;
 static PyObject *__pyx_n_s_MMDDYYS;
 static PyObject *__pyx_n_s_MMDDYYS10;
-static PyObject *__pyx_n_s_MONNAME;
-static PyObject *__pyx_n_s_MONTH;
 static PyObject *__pyx_n_s_NULL;
 static PyObject *__pyx_n_s_OrderedDict;
 static PyObject *__pyx_n_s_PyreadstatError;
-static PyObject *__pyx_n_s_QTR;
-static PyObject *__pyx_n_s_QTRR;
 static PyObject *__pyx_n_s_ReadstatError;
 static PyObject *__pyx_n_s_SDATE;
 static PyObject *__pyx_n_s_SDATE10;
@@ -2068,6 +2092,7 @@ static PyObject *__pyx_n_s_TIME20;
 static PyObject *__pyx_kp_s_TIME20_3;
 static PyObject *__pyx_n_s_TIME5;
 static PyObject *__pyx_n_s_TIME8;
+static PyObject *__pyx_n_s_TIMEAMPM;
 static PyObject *__pyx_n_s_TOD;
 static PyObject *__pyx_kp_s_This_class_holds_metadata_we_wa;
 static PyObject *__pyx_n_s_TypeError;
@@ -2076,8 +2101,6 @@ static PyObject *__pyx_kp_s_Unknown_file_format;
 static PyObject *__pyx_kp_s_Unkown_data_type;
 static PyObject *__pyx_n_s_WEEKDATE;
 static PyObject *__pyx_n_s_WEEKDATX;
-static PyObject *__pyx_n_s_WEEKDAY;
-static PyObject *__pyx_n_s_YEAR;
 static PyObject *__pyx_n_s_YMDHMS16;
 static PyObject *__pyx_n_s_YMDHMS19;
 static PyObject *__pyx_kp_s_YMDHMS19_2;
@@ -2248,7 +2271,7 @@ static PyObject *__pyx_tuple__9;
 static PyObject *__pyx_codeobj__10;
 /* Late includes */
 
-/* "pyreadstat/_readstat_parser.pyx":74
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@@ -2281,7 +2304,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
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-  /* "pyreadstat/_readstat_parser.pyx":75
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   __pyx_v_self->n_obs = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":76
+  /* "pyreadstat/_readstat_parser.pyx":82
  *     def __cinit__(self):
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@@ -2299,7 +2322,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
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   __pyx_v_self->n_vars = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":77
+  /* "pyreadstat/_readstat_parser.pyx":83
  *         self.n_obs = 0
  *         self.n_vars = 0
  *         self.max_n_obs = 0             # <<<<<<<<<<<<<<
@@ -2308,14 +2331,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
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   __pyx_v_self->max_n_obs = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":78
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 78, __pyx_L1_error)
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@@ -2323,14 +2346,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->col_data = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":79
+  /* "pyreadstat/_readstat_parser.pyx":85
  *         self.max_n_obs = 0
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  *         self.col_labels = list()
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 79, __pyx_L1_error)
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@@ -2338,14 +2361,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->col_data_len = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":80
+  /* "pyreadstat/_readstat_parser.pyx":86
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  *         self.col_labels = list()
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 80, __pyx_L1_error)
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@@ -2353,14 +2376,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->col_names = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":81
+  /* "pyreadstat/_readstat_parser.pyx":87
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  *         self.col_names = list()
  *         self.col_labels = list()             # <<<<<<<<<<<<<<
  *         self.col_dtypes = list()
  *         self.col_numpy_dtypes = list()
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 81, __pyx_L1_error)
+  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 87, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
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   __Pyx_GOTREF(__pyx_v_self->col_labels);
@@ -2368,14 +2391,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->col_labels = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":82
+  /* "pyreadstat/_readstat_parser.pyx":88
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  *         self.col_labels = list()
  *         self.col_dtypes = list()             # <<<<<<<<<<<<<<
  *         self.col_numpy_dtypes = list()
  *         self.col_dtypes_isobject = list()
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 82, __pyx_L1_error)
+  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 88, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __Pyx_GIVEREF(__pyx_t_1);
   __Pyx_GOTREF(__pyx_v_self->col_dtypes);
@@ -2383,14 +2406,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->col_dtypes = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":83
+  /* "pyreadstat/_readstat_parser.pyx":89
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  *         self.col_dtypes = list()
  *         self.col_numpy_dtypes = list()             # <<<<<<<<<<<<<<
  *         self.col_dtypes_isobject = list()
  *         self.col_dytpes_isfloat = list()
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 83, __pyx_L1_error)
+  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 89, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __Pyx_GIVEREF(__pyx_t_1);
   __Pyx_GOTREF(__pyx_v_self->col_numpy_dtypes);
@@ -2398,14 +2421,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->col_numpy_dtypes = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":84
+  /* "pyreadstat/_readstat_parser.pyx":90
  *         self.col_dtypes = list()
  *         self.col_numpy_dtypes = list()
  *         self.col_dtypes_isobject = list()             # <<<<<<<<<<<<<<
  *         self.col_dytpes_isfloat = list()
  *         self.col_formats = list()
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 84, __pyx_L1_error)
+  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 90, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __Pyx_GIVEREF(__pyx_t_1);
   __Pyx_GOTREF(__pyx_v_self->col_dtypes_isobject);
@@ -2413,14 +2436,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->col_dtypes_isobject = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":85
+  /* "pyreadstat/_readstat_parser.pyx":91
  *         self.col_numpy_dtypes = list()
  *         self.col_dtypes_isobject = list()
  *         self.col_dytpes_isfloat = list()             # <<<<<<<<<<<<<<
  *         self.col_formats = list()
  *         self.col_formats_original = list()
  */
-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 85, __pyx_L1_error)
+  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 91, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __Pyx_GIVEREF(__pyx_t_1);
   __Pyx_GOTREF(__pyx_v_self->col_dytpes_isfloat);
@@ -2428,14 +2451,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->col_dytpes_isfloat = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":86
+  /* "pyreadstat/_readstat_parser.pyx":92
  *         self.col_dtypes_isobject = list()
  *         self.col_dytpes_isfloat = list()
  *         self.col_formats = list()             # <<<<<<<<<<<<<<
  *         self.col_formats_original = list()
  *         self.origin = None
  */
-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 86, __pyx_L1_error)
+  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 92, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __Pyx_GIVEREF(__pyx_t_1);
   __Pyx_GOTREF(__pyx_v_self->col_formats);
@@ -2443,14 +2466,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->col_formats = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":87
+  /* "pyreadstat/_readstat_parser.pyx":93
  *         self.col_dytpes_isfloat = list()
  *         self.col_formats = list()
  *         self.col_formats_original = list()             # <<<<<<<<<<<<<<
  *         self.origin = None
  *         self.is_unkown_number_rows = 0
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 87, __pyx_L1_error)
+  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 93, __pyx_L1_error)
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@@ -2458,7 +2481,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->col_formats_original = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":88
+  /* "pyreadstat/_readstat_parser.pyx":94
  *         self.col_formats = list()
  *         self.col_formats_original = list()
  *         self.origin = None             # <<<<<<<<<<<<<<
@@ -2471,7 +2494,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __Pyx_DECREF(__pyx_v_self->origin);
   __pyx_v_self->origin = Py_None;
 
-  /* "pyreadstat/_readstat_parser.pyx":89
+  /* "pyreadstat/_readstat_parser.pyx":95
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  *         self.origin = None
  *         self.is_unkown_number_rows = 0             # <<<<<<<<<<<<<<
@@ -2480,7 +2503,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
  */
   __pyx_v_self->is_unkown_number_rows = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":90
+  /* "pyreadstat/_readstat_parser.pyx":96
  *         self.origin = None
  *         self.is_unkown_number_rows = 0
  *         self.file_encoding = None             # <<<<<<<<<<<<<<
@@ -2493,7 +2516,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __Pyx_DECREF(__pyx_v_self->file_encoding);
   __pyx_v_self->file_encoding = ((PyObject*)Py_None);
 
-  /* "pyreadstat/_readstat_parser.pyx":91
+  /* "pyreadstat/_readstat_parser.pyx":97
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  *         self.file_encoding = None
  *         self.file_label = None             # <<<<<<<<<<<<<<
@@ -2506,7 +2529,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __Pyx_DECREF(__pyx_v_self->file_label);
   __pyx_v_self->file_label = ((PyObject*)Py_None);
 
-  /* "pyreadstat/_readstat_parser.pyx":92
+  /* "pyreadstat/_readstat_parser.pyx":98
  *         self.file_encoding = None
  *         self.file_label = None
  *         self.metaonly = 0             # <<<<<<<<<<<<<<
@@ -2515,7 +2538,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
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   __pyx_v_self->metaonly = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":93
+  /* "pyreadstat/_readstat_parser.pyx":99
  *         self.file_label = None
  *         self.metaonly = 0
  *         self.dates_as_pandas = 0             # <<<<<<<<<<<<<<
@@ -2524,14 +2547,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
  */
   __pyx_v_self->dates_as_pandas = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":94
+  /* "pyreadstat/_readstat_parser.pyx":100
  *         self.metaonly = 0
  *         self.dates_as_pandas = 0
  *         self.label_to_var_name = dict()             # <<<<<<<<<<<<<<
  *         self.labels_raw = dict()
  *         self.notes = list()
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-  __pyx_t_1 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 94, __pyx_L1_error)
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   __Pyx_GOTREF(__pyx_t_1);
   __Pyx_GIVEREF(__pyx_t_1);
   __Pyx_GOTREF(__pyx_v_self->label_to_var_name);
@@ -2539,14 +2562,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->label_to_var_name = __pyx_t_1;
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":95
+  /* "pyreadstat/_readstat_parser.pyx":101
  *         self.dates_as_pandas = 0
  *         self.label_to_var_name = dict()
  *         self.labels_raw = dict()             # <<<<<<<<<<<<<<
  *         self.notes = list()
  *         self.user_encoding = None
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-  __pyx_t_1 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 95, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 101, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __Pyx_GIVEREF(__pyx_t_1);
   __Pyx_GOTREF(__pyx_v_self->labels_raw);
@@ -2554,14 +2577,14 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->labels_raw = __pyx_t_1;
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":96
+  /* "pyreadstat/_readstat_parser.pyx":102
  *         self.label_to_var_name = dict()
  *         self.labels_raw = dict()
  *         self.notes = list()             # <<<<<<<<<<<<<<
  *         self.user_encoding = None
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 96, __pyx_L1_error)
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   __Pyx_GOTREF(__pyx_v_self->notes);
@@ -2569,7 +2592,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
   __pyx_v_self->notes = __pyx_t_1;
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":97
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  *         self.notes = list()
  *         self.user_encoding = None             # <<<<<<<<<<<<<<
@@ -2582,7 +2605,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
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-  /* "pyreadstat/_readstat_parser.pyx":98
+  /* "pyreadstat/_readstat_parser.pyx":104
  *         self.notes = list()
  *         self.user_encoding = None
  *         self.table_name = None             # <<<<<<<<<<<<<<
@@ -2595,7 +2618,7 @@ static int __pyx_pf_10pyreadstat_16_readstat_parser_14data_container___cinit__(s
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-  /* "pyreadstat/_readstat_parser.pyx":99
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  *         self.user_encoding = None
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-  /* "pyreadstat/_readstat_parser.pyx":100
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  *         self.use_cols = list()             # <<<<<<<<<<<<<<
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-  /* "pyreadstat/_readstat_parser.pyx":131
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-  /* "pyreadstat/_readstat_parser.pyx":132
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-  /* "pyreadstat/_readstat_parser.pyx":133
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-  /* "pyreadstat/_readstat_parser.pyx":114
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-  /* "pyreadstat/_readstat_parser.pyx":153
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@@ -3156,29 +3179,29 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
   switch (__pyx_v_file_format) {
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-    /* "pyreadstat/_readstat_parser.pyx":154
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-    __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_sas_all_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 154, __pyx_L1_error)
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-      /* "pyreadstat/_readstat_parser.pyx":155
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-      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_sas_date_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 155, __pyx_L1_error)
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-        /* "pyreadstat/_readstat_parser.pyx":156
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@@ -3188,7 +3211,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
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-        /* "pyreadstat/_readstat_parser.pyx":155
+        /* "pyreadstat/_readstat_parser.pyx":161
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@@ -3197,18 +3220,18 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
  */
       }
 
-      /* "pyreadstat/_readstat_parser.pyx":157
+      /* "pyreadstat/_readstat_parser.pyx":163
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-      __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_sas_datetime_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 157, __pyx_L1_error)
+      __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_sas_datetime_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 163, __pyx_L1_error)
       __pyx_t_2 = (__pyx_t_1 != 0);
       if (__pyx_t_2) {
 
-        /* "pyreadstat/_readstat_parser.pyx":158
+        /* "pyreadstat/_readstat_parser.pyx":164
  *                 return DATE_FORMAT_DATE
  *             elif var_format in sas_datetime_formats:
  *                 return DATE_FORMAT_DATETIME             # <<<<<<<<<<<<<<
@@ -3218,7 +3241,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
         __pyx_r = __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_DATETIME;
         goto __pyx_L0;
 
-        /* "pyreadstat/_readstat_parser.pyx":157
+        /* "pyreadstat/_readstat_parser.pyx":163
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  *             elif var_format in sas_datetime_formats:             # <<<<<<<<<<<<<<
@@ -3227,18 +3250,18 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
  */
       }
 
-      /* "pyreadstat/_readstat_parser.pyx":159
+      /* "pyreadstat/_readstat_parser.pyx":165
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-      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_sas_time_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 159, __pyx_L1_error)
+      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_sas_time_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 165, __pyx_L1_error)
       __pyx_t_1 = (__pyx_t_2 != 0);
       if (__pyx_t_1) {
 
-        /* "pyreadstat/_readstat_parser.pyx":160
+        /* "pyreadstat/_readstat_parser.pyx":166
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  *                 return DATE_FORMAT_TIME             # <<<<<<<<<<<<<<
@@ -3248,7 +3271,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
         __pyx_r = __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_TIME;
         goto __pyx_L0;
 
-        /* "pyreadstat/_readstat_parser.pyx":159
+        /* "pyreadstat/_readstat_parser.pyx":165
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@@ -3257,7 +3280,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
  */
       }
 
-      /* "pyreadstat/_readstat_parser.pyx":154
+      /* "pyreadstat/_readstat_parser.pyx":160
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  *         if var_format in sas_all_formats:             # <<<<<<<<<<<<<<
@@ -3267,7 +3290,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
       goto __pyx_L3;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":162
+    /* "pyreadstat/_readstat_parser.pyx":168
  *                 return DATE_FORMAT_TIME
  *         else:
  *             return DATE_FORMAT_NOTADATE             # <<<<<<<<<<<<<<
@@ -3280,7 +3303,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
     }
     __pyx_L3:;
 
-    /* "pyreadstat/_readstat_parser.pyx":153
+    /* "pyreadstat/_readstat_parser.pyx":159
  *     Transforms a readstat var_format to a date, datetime or time format label
  *     """
  *     if file_format == FILE_FORMAT_SAS:             # <<<<<<<<<<<<<<
@@ -3290,29 +3313,29 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
     break;
     case __pyx_e_10pyreadstat_16_readstat_parser_FILE_FORMAT_SPSS:
 
-    /* "pyreadstat/_readstat_parser.pyx":165
+    /* "pyreadstat/_readstat_parser.pyx":171
  * 
  *     elif file_format == FILE_FORMAT_SPSS:
  *         if var_format in spss_all_formats:             # <<<<<<<<<<<<<<
  *             if var_format in spss_date_formats:
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  */
-    __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_spss_all_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 165, __pyx_L1_error)
+    __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_spss_all_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 171, __pyx_L1_error)
     __pyx_t_2 = (__pyx_t_1 != 0);
     if (__pyx_t_2) {
 
-      /* "pyreadstat/_readstat_parser.pyx":166
+      /* "pyreadstat/_readstat_parser.pyx":172
  *     elif file_format == FILE_FORMAT_SPSS:
  *         if var_format in spss_all_formats:
  *             if var_format in spss_date_formats:             # <<<<<<<<<<<<<<
  *                 return DATE_FORMAT_DATE
  *             elif var_format in spss_datetime_formats:
  */
-      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_spss_date_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 166, __pyx_L1_error)
+      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_spss_date_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 172, __pyx_L1_error)
       __pyx_t_1 = (__pyx_t_2 != 0);
       if (__pyx_t_1) {
 
-        /* "pyreadstat/_readstat_parser.pyx":167
+        /* "pyreadstat/_readstat_parser.pyx":173
  *         if var_format in spss_all_formats:
  *             if var_format in spss_date_formats:
  *                 return DATE_FORMAT_DATE             # <<<<<<<<<<<<<<
@@ -3322,7 +3345,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
         __pyx_r = __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_DATE;
         goto __pyx_L0;
 
-        /* "pyreadstat/_readstat_parser.pyx":166
+        /* "pyreadstat/_readstat_parser.pyx":172
  *     elif file_format == FILE_FORMAT_SPSS:
  *         if var_format in spss_all_formats:
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@@ -3331,18 +3354,18 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
  */
       }
 
-      /* "pyreadstat/_readstat_parser.pyx":168
+      /* "pyreadstat/_readstat_parser.pyx":174
  *             if var_format in spss_date_formats:
  *                 return DATE_FORMAT_DATE
  *             elif var_format in spss_datetime_formats:             # <<<<<<<<<<<<<<
  *                 return DATE_FORMAT_DATETIME
  *             elif var_format in spss_time_formats:
  */
-      __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_spss_datetime_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 168, __pyx_L1_error)
+      __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_spss_datetime_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 174, __pyx_L1_error)
       __pyx_t_2 = (__pyx_t_1 != 0);
       if (__pyx_t_2) {
 
-        /* "pyreadstat/_readstat_parser.pyx":169
+        /* "pyreadstat/_readstat_parser.pyx":175
  *                 return DATE_FORMAT_DATE
  *             elif var_format in spss_datetime_formats:
  *                 return DATE_FORMAT_DATETIME             # <<<<<<<<<<<<<<
@@ -3352,7 +3375,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
         __pyx_r = __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_DATETIME;
         goto __pyx_L0;
 
-        /* "pyreadstat/_readstat_parser.pyx":168
+        /* "pyreadstat/_readstat_parser.pyx":174
  *             if var_format in spss_date_formats:
  *                 return DATE_FORMAT_DATE
  *             elif var_format in spss_datetime_formats:             # <<<<<<<<<<<<<<
@@ -3361,18 +3384,18 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
  */
       }
 
-      /* "pyreadstat/_readstat_parser.pyx":170
+      /* "pyreadstat/_readstat_parser.pyx":176
  *             elif var_format in spss_datetime_formats:
  *                 return DATE_FORMAT_DATETIME
  *             elif var_format in spss_time_formats:             # <<<<<<<<<<<<<<
  *                 return DATE_FORMAT_TIME
  *         else:
  */
-      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_spss_time_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 170, __pyx_L1_error)
+      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_spss_time_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 176, __pyx_L1_error)
       __pyx_t_1 = (__pyx_t_2 != 0);
       if (__pyx_t_1) {
 
-        /* "pyreadstat/_readstat_parser.pyx":171
+        /* "pyreadstat/_readstat_parser.pyx":177
  *                 return DATE_FORMAT_DATETIME
  *             elif var_format in spss_time_formats:
  *                 return DATE_FORMAT_TIME             # <<<<<<<<<<<<<<
@@ -3382,7 +3405,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
         __pyx_r = __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_TIME;
         goto __pyx_L0;
 
-        /* "pyreadstat/_readstat_parser.pyx":170
+        /* "pyreadstat/_readstat_parser.pyx":176
  *             elif var_format in spss_datetime_formats:
  *                 return DATE_FORMAT_DATETIME
  *             elif var_format in spss_time_formats:             # <<<<<<<<<<<<<<
@@ -3391,7 +3414,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
  */
       }
 
-      /* "pyreadstat/_readstat_parser.pyx":165
+      /* "pyreadstat/_readstat_parser.pyx":171
  * 
  *     elif file_format == FILE_FORMAT_SPSS:
  *         if var_format in spss_all_formats:             # <<<<<<<<<<<<<<
@@ -3401,7 +3424,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
       goto __pyx_L5;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":173
+    /* "pyreadstat/_readstat_parser.pyx":179
  *                 return DATE_FORMAT_TIME
  *         else:
  *             return DATE_FORMAT_NOTADATE             # <<<<<<<<<<<<<<
@@ -3414,7 +3437,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
     }
     __pyx_L5:;
 
-    /* "pyreadstat/_readstat_parser.pyx":164
+    /* "pyreadstat/_readstat_parser.pyx":170
  *             return DATE_FORMAT_NOTADATE
  * 
  *     elif file_format == FILE_FORMAT_SPSS:             # <<<<<<<<<<<<<<
@@ -3424,29 +3447,29 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
     break;
     case __pyx_e_10pyreadstat_16_readstat_parser_FILE_FORMAT_STATA:
 
-    /* "pyreadstat/_readstat_parser.pyx":176
+    /* "pyreadstat/_readstat_parser.pyx":182
  * 
  *     elif file_format == FILE_FORMAT_STATA:
  *         if var_format in stata_all_formats:             # <<<<<<<<<<<<<<
  *             if var_format in stata_date_formats:
  *                 return DATE_FORMAT_DATE
  */
-    __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_stata_all_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 176, __pyx_L1_error)
+    __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_stata_all_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 182, __pyx_L1_error)
     __pyx_t_2 = (__pyx_t_1 != 0);
     if (__pyx_t_2) {
 
-      /* "pyreadstat/_readstat_parser.pyx":177
+      /* "pyreadstat/_readstat_parser.pyx":183
  *     elif file_format == FILE_FORMAT_STATA:
  *         if var_format in stata_all_formats:
  *             if var_format in stata_date_formats:             # <<<<<<<<<<<<<<
  *                 return DATE_FORMAT_DATE
  *             elif var_format in stata_datetime_formats:
  */
-      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_stata_date_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 177, __pyx_L1_error)
+      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_stata_date_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 183, __pyx_L1_error)
       __pyx_t_1 = (__pyx_t_2 != 0);
       if (__pyx_t_1) {
 
-        /* "pyreadstat/_readstat_parser.pyx":178
+        /* "pyreadstat/_readstat_parser.pyx":184
  *         if var_format in stata_all_formats:
  *             if var_format in stata_date_formats:
  *                 return DATE_FORMAT_DATE             # <<<<<<<<<<<<<<
@@ -3456,7 +3479,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
         __pyx_r = __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_DATE;
         goto __pyx_L0;
 
-        /* "pyreadstat/_readstat_parser.pyx":177
+        /* "pyreadstat/_readstat_parser.pyx":183
  *     elif file_format == FILE_FORMAT_STATA:
  *         if var_format in stata_all_formats:
  *             if var_format in stata_date_formats:             # <<<<<<<<<<<<<<
@@ -3465,18 +3488,18 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
  */
       }
 
-      /* "pyreadstat/_readstat_parser.pyx":179
+      /* "pyreadstat/_readstat_parser.pyx":185
  *             if var_format in stata_date_formats:
  *                 return DATE_FORMAT_DATE
  *             elif var_format in stata_datetime_formats:             # <<<<<<<<<<<<<<
  *                 return DATE_FORMAT_DATETIME
  *             elif var_format in stata_time_formats:
  */
-      __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_stata_datetime_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 179, __pyx_L1_error)
+      __pyx_t_1 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_stata_datetime_formats, Py_EQ)); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 185, __pyx_L1_error)
       __pyx_t_2 = (__pyx_t_1 != 0);
       if (__pyx_t_2) {
 
-        /* "pyreadstat/_readstat_parser.pyx":180
+        /* "pyreadstat/_readstat_parser.pyx":186
  *                 return DATE_FORMAT_DATE
  *             elif var_format in stata_datetime_formats:
  *                 return DATE_FORMAT_DATETIME             # <<<<<<<<<<<<<<
@@ -3486,7 +3509,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
         __pyx_r = __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_DATETIME;
         goto __pyx_L0;
 
-        /* "pyreadstat/_readstat_parser.pyx":179
+        /* "pyreadstat/_readstat_parser.pyx":185
  *             if var_format in stata_date_formats:
  *                 return DATE_FORMAT_DATE
  *             elif var_format in stata_datetime_formats:             # <<<<<<<<<<<<<<
@@ -3495,18 +3518,18 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
  */
       }
 
-      /* "pyreadstat/_readstat_parser.pyx":181
+      /* "pyreadstat/_readstat_parser.pyx":187
  *             elif var_format in stata_datetime_formats:
  *                 return DATE_FORMAT_DATETIME
  *             elif var_format in stata_time_formats:             # <<<<<<<<<<<<<<
  *                 return DATE_FORMAT_TIME
  *         else:
  */
-      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_stata_time_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 181, __pyx_L1_error)
+      __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_var_format, __pyx_v_10pyreadstat_16_readstat_parser_stata_time_formats, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 187, __pyx_L1_error)
       __pyx_t_1 = (__pyx_t_2 != 0);
       if (__pyx_t_1) {
 
-        /* "pyreadstat/_readstat_parser.pyx":182
+        /* "pyreadstat/_readstat_parser.pyx":188
  *                 return DATE_FORMAT_DATETIME
  *             elif var_format in stata_time_formats:
  *                 return DATE_FORMAT_TIME             # <<<<<<<<<<<<<<
@@ -3516,7 +3539,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
         __pyx_r = __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_TIME;
         goto __pyx_L0;
 
-        /* "pyreadstat/_readstat_parser.pyx":181
+        /* "pyreadstat/_readstat_parser.pyx":187
  *             elif var_format in stata_datetime_formats:
  *                 return DATE_FORMAT_DATETIME
  *             elif var_format in stata_time_formats:             # <<<<<<<<<<<<<<
@@ -3525,7 +3548,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
  */
       }
 
-      /* "pyreadstat/_readstat_parser.pyx":176
+      /* "pyreadstat/_readstat_parser.pyx":182
  * 
  *     elif file_format == FILE_FORMAT_STATA:
  *         if var_format in stata_all_formats:             # <<<<<<<<<<<<<<
@@ -3535,7 +3558,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
       goto __pyx_L7;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":184
+    /* "pyreadstat/_readstat_parser.pyx":190
  *                 return DATE_FORMAT_TIME
  *         else:
  *             return DATE_FORMAT_NOTADATE             # <<<<<<<<<<<<<<
@@ -3548,7 +3571,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
     }
     __pyx_L7:;
 
-    /* "pyreadstat/_readstat_parser.pyx":175
+    /* "pyreadstat/_readstat_parser.pyx":181
  *             return DATE_FORMAT_NOTADATE
  * 
  *     elif file_format == FILE_FORMAT_STATA:             # <<<<<<<<<<<<<<
@@ -3559,7 +3582,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
     default: break;
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":149
+  /* "pyreadstat/_readstat_parser.pyx":155
  * 
  * 
  * cdef py_datetime_format transform_variable_format(str var_format, py_file_format file_format):             # <<<<<<<<<<<<<<
@@ -3578,7 +3601,7 @@ static __pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format __pyx_f_10pyre
   return __pyx_r;
 }
 
-/* "pyreadstat/_readstat_parser.pyx":186
+/* "pyreadstat/_readstat_parser.pyx":192
  *             return DATE_FORMAT_NOTADATE
  * 
  * cdef object transform_datetime(py_datetime_format var_format, double tstamp, py_file_format file_format, object origin, bint dates_as_pandas):             # <<<<<<<<<<<<<<
@@ -3604,7 +3627,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("transform_datetime", 0);
 
-  /* "pyreadstat/_readstat_parser.pyx":199
+  /* "pyreadstat/_readstat_parser.pyx":205
  *     cdef object mydat
  * 
  *     if var_format == DATE_FORMAT_DATE:             # <<<<<<<<<<<<<<
@@ -3614,7 +3637,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
   switch (__pyx_v_var_format) {
     case __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_DATE:
 
-    /* "pyreadstat/_readstat_parser.pyx":200
+    /* "pyreadstat/_readstat_parser.pyx":206
  * 
  *     if var_format == DATE_FORMAT_DATE:
  *         if file_format == FILE_FORMAT_SPSS:             # <<<<<<<<<<<<<<
@@ -3624,7 +3647,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
     __pyx_t_1 = ((__pyx_v_file_format == __pyx_e_10pyreadstat_16_readstat_parser_FILE_FORMAT_SPSS) != 0);
     if (__pyx_t_1) {
 
-      /* "pyreadstat/_readstat_parser.pyx":202
+      /* "pyreadstat/_readstat_parser.pyx":208
  *         if file_format == FILE_FORMAT_SPSS:
  *             # tstamp is in seconds
  *             days = <int> (floor(tstamp / 86400))             # <<<<<<<<<<<<<<
@@ -3633,7 +3656,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_days = ((int)floor((__pyx_v_tstamp / 86400.0)));
 
-      /* "pyreadstat/_readstat_parser.pyx":203
+      /* "pyreadstat/_readstat_parser.pyx":209
  *             # tstamp is in seconds
  *             days = <int> (floor(tstamp / 86400))
  *             secs = <int> (tstamp % 86400)             # <<<<<<<<<<<<<<
@@ -3642,19 +3665,19 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_secs = ((int)__Pyx_mod_double(__pyx_v_tstamp, 86400.0));
 
-      /* "pyreadstat/_readstat_parser.pyx":204
+      /* "pyreadstat/_readstat_parser.pyx":210
  *             days = <int> (floor(tstamp / 86400))
  *             secs = <int> (tstamp % 86400)
  *             tdelta = timedelta_new(days, secs, 0)             # <<<<<<<<<<<<<<
  *             #tdelta = timedelta(seconds=tstamp)
  *         else:
  */
-      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, __pyx_v_secs, 0); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 204, __pyx_L1_error)
+      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, __pyx_v_secs, 0); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 210, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_2);
       __pyx_v_tdelta = __pyx_t_2;
       __pyx_t_2 = 0;
 
-      /* "pyreadstat/_readstat_parser.pyx":200
+      /* "pyreadstat/_readstat_parser.pyx":206
  * 
  *     if var_format == DATE_FORMAT_DATE:
  *         if file_format == FILE_FORMAT_SPSS:             # <<<<<<<<<<<<<<
@@ -3664,7 +3687,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
       goto __pyx_L3;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":208
+    /* "pyreadstat/_readstat_parser.pyx":214
  *         else:
  *             # tstamp is in days
  *             days = <int> tstamp             # <<<<<<<<<<<<<<
@@ -3674,33 +3697,33 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
     /*else*/ {
       __pyx_v_days = ((int)__pyx_v_tstamp);
 
-      /* "pyreadstat/_readstat_parser.pyx":209
+      /* "pyreadstat/_readstat_parser.pyx":215
  *             # tstamp is in days
  *             days = <int> tstamp
  *             tdelta = timedelta_new(days, 0, 0)             # <<<<<<<<<<<<<<
  *             #tdelta = timedelta(days=tstamp)
  *         mydat = origin + tdelta
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-      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, 0, 0); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 209, __pyx_L1_error)
+      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, 0, 0); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 215, __pyx_L1_error)
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     }
     __pyx_L3:;
 
-    /* "pyreadstat/_readstat_parser.pyx":211
+    /* "pyreadstat/_readstat_parser.pyx":217
  *             tdelta = timedelta_new(days, 0, 0)
  *             #tdelta = timedelta(days=tstamp)
  *         mydat = origin + tdelta             # <<<<<<<<<<<<<<
  *         if dates_as_pandas:
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-    __pyx_t_2 = PyNumber_Add(__pyx_v_origin, __pyx_v_tdelta); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 211, __pyx_L1_error)
+    __pyx_t_2 = PyNumber_Add(__pyx_v_origin, __pyx_v_tdelta); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 217, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_2);
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     __pyx_t_2 = 0;
 
-    /* "pyreadstat/_readstat_parser.pyx":212
+    /* "pyreadstat/_readstat_parser.pyx":218
  *             #tdelta = timedelta(days=tstamp)
  *         mydat = origin + tdelta
  *         if dates_as_pandas:             # <<<<<<<<<<<<<<
@@ -3710,7 +3733,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
     __pyx_t_1 = (__pyx_v_dates_as_pandas != 0);
     if (__pyx_t_1) {
 
-      /* "pyreadstat/_readstat_parser.pyx":213
+      /* "pyreadstat/_readstat_parser.pyx":219
  *         mydat = origin + tdelta
  *         if dates_as_pandas:
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@@ -3722,7 +3745,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
       __pyx_r = __pyx_v_mydat;
       goto __pyx_L0;
 
-      /* "pyreadstat/_readstat_parser.pyx":212
+      /* "pyreadstat/_readstat_parser.pyx":218
  *             #tdelta = timedelta(days=tstamp)
  *         mydat = origin + tdelta
  *         if dates_as_pandas:             # <<<<<<<<<<<<<<
@@ -3731,7 +3754,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":215
+    /* "pyreadstat/_readstat_parser.pyx":221
  *             return mydat
  *         else:
  *             return mydat.date()             # <<<<<<<<<<<<<<
@@ -3740,7 +3763,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
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-      __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_v_mydat, __pyx_n_s_date); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 215, __pyx_L1_error)
+      __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_v_mydat, __pyx_n_s_date); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 221, __pyx_L1_error)
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@@ -3754,7 +3777,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
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       __Pyx_XDECREF(__pyx_t_4); __pyx_t_4 = 0;
-      if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 215, __pyx_L1_error)
+      if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 221, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_2);
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@@ -3762,7 +3785,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
       goto __pyx_L0;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":199
+    /* "pyreadstat/_readstat_parser.pyx":205
  *     cdef object mydat
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  *     if var_format == DATE_FORMAT_DATE:             # <<<<<<<<<<<<<<
@@ -3772,7 +3795,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
     break;
     case __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_DATETIME:
 
-    /* "pyreadstat/_readstat_parser.pyx":217
+    /* "pyreadstat/_readstat_parser.pyx":223
  *             return mydat.date()
  *     elif var_format == DATE_FORMAT_DATETIME:
  *         if file_format == FILE_FORMAT_STATA:             # <<<<<<<<<<<<<<
@@ -3782,7 +3805,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
     __pyx_t_1 = ((__pyx_v_file_format == __pyx_e_10pyreadstat_16_readstat_parser_FILE_FORMAT_STATA) != 0);
     if (__pyx_t_1) {
 
-      /* "pyreadstat/_readstat_parser.pyx":219
+      /* "pyreadstat/_readstat_parser.pyx":225
  *         if file_format == FILE_FORMAT_STATA:
  *             # tstamp is in millisecons
  *             days = <int> (floor(tstamp / 86400000))             # <<<<<<<<<<<<<<
@@ -3791,7 +3814,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_days = ((int)floor((__pyx_v_tstamp / 86400000.0)));
 
-      /* "pyreadstat/_readstat_parser.pyx":220
+      /* "pyreadstat/_readstat_parser.pyx":226
  *             # tstamp is in millisecons
  *             days = <int> (floor(tstamp / 86400000))
  *             msecs = tstamp % 86400000             # <<<<<<<<<<<<<<
@@ -3800,7 +3823,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_msecs = __Pyx_mod_double(__pyx_v_tstamp, 86400000.0);
 
-      /* "pyreadstat/_readstat_parser.pyx":221
+      /* "pyreadstat/_readstat_parser.pyx":227
  *             days = <int> (floor(tstamp / 86400000))
  *             msecs = tstamp % 86400000
  *             secs = <int> (msecs/1000)             # <<<<<<<<<<<<<<
@@ -3809,7 +3832,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_secs = ((int)(__pyx_v_msecs / 1000.0));
 
-      /* "pyreadstat/_readstat_parser.pyx":222
+      /* "pyreadstat/_readstat_parser.pyx":228
  *             msecs = tstamp % 86400000
  *             secs = <int> (msecs/1000)
  *             usecs = <int> ((msecs % 1000) * 1000 )             # <<<<<<<<<<<<<<
@@ -3818,19 +3841,19 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_usecs = ((int)(__Pyx_mod_double(__pyx_v_msecs, 1000.0) * 1000.0));
 
-      /* "pyreadstat/_readstat_parser.pyx":223
+      /* "pyreadstat/_readstat_parser.pyx":229
  *             secs = <int> (msecs/1000)
  *             usecs = <int> ((msecs % 1000) * 1000 )
  *             tdelta = timedelta_new(days, secs, usecs)             # <<<<<<<<<<<<<<
  *             #tdelta = timedelta(milliseconds=tstamp)
  *         else:
  */
-      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, __pyx_v_secs, __pyx_v_usecs); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 223, __pyx_L1_error)
+      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, __pyx_v_secs, __pyx_v_usecs); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 229, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_2);
       __pyx_v_tdelta = __pyx_t_2;
       __pyx_t_2 = 0;
 
-      /* "pyreadstat/_readstat_parser.pyx":217
+      /* "pyreadstat/_readstat_parser.pyx":223
  *             return mydat.date()
  *     elif var_format == DATE_FORMAT_DATETIME:
  *         if file_format == FILE_FORMAT_STATA:             # <<<<<<<<<<<<<<
@@ -3840,7 +3863,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
       goto __pyx_L5;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":227
+    /* "pyreadstat/_readstat_parser.pyx":233
  *         else:
  *             # tstamp in seconds
  *             days = <int> (floor(tstamp / 86400))             # <<<<<<<<<<<<<<
@@ -3850,7 +3873,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
     /*else*/ {
       __pyx_v_days = ((int)floor((__pyx_v_tstamp / 86400.0)));
 
-      /* "pyreadstat/_readstat_parser.pyx":228
+      /* "pyreadstat/_readstat_parser.pyx":234
  *             # tstamp in seconds
  *             days = <int> (floor(tstamp / 86400))
  *             secs = <int> (tstamp % 86400)             # <<<<<<<<<<<<<<
@@ -3859,33 +3882,33 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_secs = ((int)__Pyx_mod_double(__pyx_v_tstamp, 86400.0));
 
-      /* "pyreadstat/_readstat_parser.pyx":229
+      /* "pyreadstat/_readstat_parser.pyx":235
  *             days = <int> (floor(tstamp / 86400))
  *             secs = <int> (tstamp % 86400)
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-      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, __pyx_v_secs, 0); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 229, __pyx_L1_error)
+      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, __pyx_v_secs, 0); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 235, __pyx_L1_error)
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       __pyx_t_2 = 0;
     }
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-    /* "pyreadstat/_readstat_parser.pyx":231
+    /* "pyreadstat/_readstat_parser.pyx":237
  *             tdelta = timedelta_new(days, secs, 0)
  *             #tdelta = timedelta(seconds=tstamp)
  *         mydat = origin + tdelta             # <<<<<<<<<<<<<<
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  *     elif var_format == DATE_FORMAT_TIME:
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-    __pyx_t_2 = PyNumber_Add(__pyx_v_origin, __pyx_v_tdelta); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 231, __pyx_L1_error)
+    __pyx_t_2 = PyNumber_Add(__pyx_v_origin, __pyx_v_tdelta); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 237, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_2);
     __pyx_v_mydat = __pyx_t_2;
     __pyx_t_2 = 0;
 
-    /* "pyreadstat/_readstat_parser.pyx":232
+    /* "pyreadstat/_readstat_parser.pyx":238
  *             #tdelta = timedelta(seconds=tstamp)
  *         mydat = origin + tdelta
  *         return mydat             # <<<<<<<<<<<<<<
@@ -3897,7 +3920,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
     __pyx_r = __pyx_v_mydat;
     goto __pyx_L0;
 
-    /* "pyreadstat/_readstat_parser.pyx":216
+    /* "pyreadstat/_readstat_parser.pyx":222
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  *     elif var_format == DATE_FORMAT_DATETIME:             # <<<<<<<<<<<<<<
@@ -3907,7 +3930,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
     break;
     case __pyx_e_10pyreadstat_16_readstat_parser_DATE_FORMAT_TIME:
 
-    /* "pyreadstat/_readstat_parser.pyx":234
+    /* "pyreadstat/_readstat_parser.pyx":240
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  *     elif var_format == DATE_FORMAT_TIME:
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@@ -3917,7 +3940,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
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     if (__pyx_t_1) {
 
-      /* "pyreadstat/_readstat_parser.pyx":236
+      /* "pyreadstat/_readstat_parser.pyx":242
  *         if file_format == FILE_FORMAT_STATA:
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  *             days = <int> (floor(tstamp / 86400000))             # <<<<<<<<<<<<<<
@@ -3926,7 +3949,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_days = ((int)floor((__pyx_v_tstamp / 86400000.0)));
 
-      /* "pyreadstat/_readstat_parser.pyx":237
+      /* "pyreadstat/_readstat_parser.pyx":243
  *             # tstamp is in millisecons
  *             days = <int> (floor(tstamp / 86400000))
  *             msecs = tstamp % 86400000             # <<<<<<<<<<<<<<
@@ -3935,7 +3958,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_msecs = __Pyx_mod_double(__pyx_v_tstamp, 86400000.0);
 
-      /* "pyreadstat/_readstat_parser.pyx":238
+      /* "pyreadstat/_readstat_parser.pyx":244
  *             days = <int> (floor(tstamp / 86400000))
  *             msecs = tstamp % 86400000
  *             secs = <int> (msecs/1000)             # <<<<<<<<<<<<<<
@@ -3944,7 +3967,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_secs = ((int)(__pyx_v_msecs / 1000.0));
 
-      /* "pyreadstat/_readstat_parser.pyx":239
+      /* "pyreadstat/_readstat_parser.pyx":245
  *             msecs = tstamp % 86400000
  *             secs = <int> (msecs/1000)
  *             usecs = <int> ((msecs % 1000) * 1000 )             # <<<<<<<<<<<<<<
@@ -3953,19 +3976,19 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
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       __pyx_v_usecs = ((int)(__Pyx_mod_double(__pyx_v_msecs, 1000.0) * 1000.0));
 
-      /* "pyreadstat/_readstat_parser.pyx":240
+      /* "pyreadstat/_readstat_parser.pyx":246
  *             secs = <int> (msecs/1000)
  *             usecs = <int> ((msecs % 1000) * 1000 )
  *             tdelta = timedelta_new(days, secs, usecs)             # <<<<<<<<<<<<<<
  *             #tdelta = timedelta(milliseconds=tstamp)
  *         else:
  */
-      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, __pyx_v_secs, __pyx_v_usecs); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 240, __pyx_L1_error)
+      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, __pyx_v_secs, __pyx_v_usecs); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 246, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_2);
       __pyx_v_tdelta = __pyx_t_2;
       __pyx_t_2 = 0;
 
-      /* "pyreadstat/_readstat_parser.pyx":234
+      /* "pyreadstat/_readstat_parser.pyx":240
  *         return mydat
  *     elif var_format == DATE_FORMAT_TIME:
  *         if file_format == FILE_FORMAT_STATA:             # <<<<<<<<<<<<<<
@@ -3975,7 +3998,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
       goto __pyx_L6;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":244
+    /* "pyreadstat/_readstat_parser.pyx":250
  *         else:
  *             # tstamp in seconds
  *             days = <int> (floor(tstamp / 86400))             # <<<<<<<<<<<<<<
@@ -3985,7 +4008,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
     /*else*/ {
       __pyx_v_days = ((int)floor((__pyx_v_tstamp / 86400.0)));
 
-      /* "pyreadstat/_readstat_parser.pyx":245
+      /* "pyreadstat/_readstat_parser.pyx":251
  *             # tstamp in seconds
  *             days = <int> (floor(tstamp / 86400))
  *             secs = <int> (tstamp % 86400)             # <<<<<<<<<<<<<<
@@ -3994,33 +4017,33 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  */
       __pyx_v_secs = ((int)__Pyx_mod_double(__pyx_v_tstamp, 86400.0));
 
-      /* "pyreadstat/_readstat_parser.pyx":246
+      /* "pyreadstat/_readstat_parser.pyx":252
  *             days = <int> (floor(tstamp / 86400))
  *             secs = <int> (tstamp % 86400)
  *             tdelta = timedelta_new(days, secs, 0)             # <<<<<<<<<<<<<<
  *             #tdelta = timedelta(seconds=tstamp)
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-      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, __pyx_v_secs, 0); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 246, __pyx_L1_error)
+      __pyx_t_2 = __pyx_f_7cpython_8datetime_timedelta_new(__pyx_v_days, __pyx_v_secs, 0); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 252, __pyx_L1_error)
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-    /* "pyreadstat/_readstat_parser.pyx":248
+    /* "pyreadstat/_readstat_parser.pyx":254
  *             tdelta = timedelta_new(days, secs, 0)
  *             #tdelta = timedelta(seconds=tstamp)
  *         mydat = origin + tdelta             # <<<<<<<<<<<<<<
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-    __pyx_t_2 = PyNumber_Add(__pyx_v_origin, __pyx_v_tdelta); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 248, __pyx_L1_error)
+    __pyx_t_2 = PyNumber_Add(__pyx_v_origin, __pyx_v_tdelta); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 254, __pyx_L1_error)
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     __pyx_v_mydat = __pyx_t_2;
     __pyx_t_2 = 0;
 
-    /* "pyreadstat/_readstat_parser.pyx":249
+    /* "pyreadstat/_readstat_parser.pyx":255
  *             #tdelta = timedelta(seconds=tstamp)
  *         mydat = origin + tdelta
  *         return mydat.time()             # <<<<<<<<<<<<<<
@@ -4028,7 +4051,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
  * 
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     __Pyx_XDECREF(__pyx_r);
-    __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_v_mydat, __pyx_n_s_time); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 249, __pyx_L1_error)
+    __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_v_mydat, __pyx_n_s_time); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 255, __pyx_L1_error)
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@@ -4042,14 +4065,14 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
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-    if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 249, __pyx_L1_error)
+    if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 255, __pyx_L1_error)
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     __pyx_r = __pyx_t_2;
     __pyx_t_2 = 0;
     goto __pyx_L0;
 
-    /* "pyreadstat/_readstat_parser.pyx":233
+    /* "pyreadstat/_readstat_parser.pyx":239
  *         mydat = origin + tdelta
  *         return mydat
  *     elif var_format == DATE_FORMAT_TIME:             # <<<<<<<<<<<<<<
@@ -4060,7 +4083,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
     default: break;
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":186
+  /* "pyreadstat/_readstat_parser.pyx":192
  *             return DATE_FORMAT_NOTADATE
  * 
  * cdef object transform_datetime(py_datetime_format var_format, double tstamp, py_file_format file_format, object origin, bint dates_as_pandas):             # <<<<<<<<<<<<<<
@@ -4085,7 +4108,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__py
   return __pyx_r;
 }
 
-/* "pyreadstat/_readstat_parser.pyx":252
+/* "pyreadstat/_readstat_parser.pyx":258
  * 
  * 
  * cdef object convert_readstat_to_python_value(readstat_value_t value, int index, data_container dc):             # <<<<<<<<<<<<<<
@@ -4127,7 +4150,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("convert_readstat_to_python_value", 0);
 
-  /* "pyreadstat/_readstat_parser.pyx":279
+  /* "pyreadstat/_readstat_parser.pyx":285
  *     cdef double tstamp
  * 
  *     var_type = dc.col_dtypes[index]             # <<<<<<<<<<<<<<
@@ -4136,15 +4159,15 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
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     PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-    __PYX_ERR(0, 279, __pyx_L1_error)
+    __PYX_ERR(0, 285, __pyx_L1_error)
   }
-  __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_dtypes, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 279, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_dtypes, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 285, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
-  __pyx_t_2 = ((readstat_type_t)__Pyx_PyInt_As_readstat_type_t(__pyx_t_1)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 279, __pyx_L1_error)
+  __pyx_t_2 = ((readstat_type_t)__Pyx_PyInt_As_readstat_type_t(__pyx_t_1)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 285, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
   __pyx_v_var_type = __pyx_t_2;
 
-  /* "pyreadstat/_readstat_parser.pyx":280
+  /* "pyreadstat/_readstat_parser.pyx":286
  * 
  *     var_type = dc.col_dtypes[index]
  *     var_format = dc.col_formats[index]             # <<<<<<<<<<<<<<
@@ -4153,15 +4176,15 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
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   if (unlikely(__pyx_v_dc->col_formats == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-    __PYX_ERR(0, 280, __pyx_L1_error)
+    __PYX_ERR(0, 286, __pyx_L1_error)
   }
-  __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_formats, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 280, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_formats, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 286, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
-  __pyx_t_3 = ((__pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format)__Pyx_PyInt_As___pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format(__pyx_t_1)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 280, __pyx_L1_error)
+  __pyx_t_3 = ((__pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format)__Pyx_PyInt_As___pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format(__pyx_t_1)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 286, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
   __pyx_v_var_format = __pyx_t_3;
 
-  /* "pyreadstat/_readstat_parser.pyx":281
+  /* "pyreadstat/_readstat_parser.pyx":287
  *     var_type = dc.col_dtypes[index]
  *     var_format = dc.col_formats[index]
  *     origin = dc.origin             # <<<<<<<<<<<<<<
@@ -4173,7 +4196,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
   __pyx_v_origin = __pyx_t_1;
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":282
+  /* "pyreadstat/_readstat_parser.pyx":288
  *     var_format = dc.col_formats[index]
  *     origin = dc.origin
  *     dates_as_pandas = dc.dates_as_pandas             # <<<<<<<<<<<<<<
@@ -4183,7 +4206,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
   __pyx_t_4 = __pyx_v_dc->dates_as_pandas;
   __pyx_v_dates_as_pandas = __pyx_t_4;
 
-  /* "pyreadstat/_readstat_parser.pyx":283
+  /* "pyreadstat/_readstat_parser.pyx":289
  *     origin = dc.origin
  *     dates_as_pandas = dc.dates_as_pandas
  *     file_format = dc.file_format             # <<<<<<<<<<<<<<
@@ -4193,7 +4216,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
   __pyx_t_5 = __pyx_v_dc->file_format;
   __pyx_v_file_format = __pyx_t_5;
 
-  /* "pyreadstat/_readstat_parser.pyx":286
+  /* "pyreadstat/_readstat_parser.pyx":292
  * 
  *     # transform to values cython can deal with
  *     if var_type == READSTAT_TYPE_STRING or var_type == READSTAT_TYPE_STRING_REF:             # <<<<<<<<<<<<<<
@@ -4204,7 +4227,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     case READSTAT_TYPE_STRING:
     case READSTAT_TYPE_STRING_REF:
 
-    /* "pyreadstat/_readstat_parser.pyx":287
+    /* "pyreadstat/_readstat_parser.pyx":293
  *     # transform to values cython can deal with
  *     if var_type == READSTAT_TYPE_STRING or var_type == READSTAT_TYPE_STRING_REF:
  *         c_str_value = readstat_string_value(value)             # <<<<<<<<<<<<<<
@@ -4213,7 +4236,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_c_str_value = readstat_string_value(__pyx_v_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":288
+    /* "pyreadstat/_readstat_parser.pyx":294
  *     if var_type == READSTAT_TYPE_STRING or var_type == READSTAT_TYPE_STRING_REF:
  *         c_str_value = readstat_string_value(value)
  *         if c_str_value != NULL:             # <<<<<<<<<<<<<<
@@ -4223,14 +4246,14 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     __pyx_t_4 = ((__pyx_v_c_str_value != NULL) != 0);
     if (__pyx_t_4) {
 
-      /* "pyreadstat/_readstat_parser.pyx":289
+      /* "pyreadstat/_readstat_parser.pyx":295
  *         c_str_value = readstat_string_value(value)
  *         if c_str_value != NULL:
  *             py_str_value = <str> c_str_value             # <<<<<<<<<<<<<<
  *         else:
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-      __pyx_t_1 = __Pyx_PyStr_FromString(__pyx_v_c_str_value); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 289, __pyx_L1_error)
+      __pyx_t_1 = __Pyx_PyStr_FromString(__pyx_v_c_str_value); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 295, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_1);
       __pyx_t_6 = __pyx_t_1;
       __Pyx_INCREF(__pyx_t_6);
@@ -4238,7 +4261,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
       __pyx_v_py_str_value = ((PyObject*)__pyx_t_6);
       __pyx_t_6 = 0;
 
-      /* "pyreadstat/_readstat_parser.pyx":288
+      /* "pyreadstat/_readstat_parser.pyx":294
  *     if var_type == READSTAT_TYPE_STRING or var_type == READSTAT_TYPE_STRING_REF:
  *         c_str_value = readstat_string_value(value)
  *         if c_str_value != NULL:             # <<<<<<<<<<<<<<
@@ -4248,7 +4271,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
       goto __pyx_L3;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":291
+    /* "pyreadstat/_readstat_parser.pyx":297
  *             py_str_value = <str> c_str_value
  *         else:
  *             py_str_value = ''             # <<<<<<<<<<<<<<
@@ -4261,7 +4284,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     }
     __pyx_L3:;
 
-    /* "pyreadstat/_readstat_parser.pyx":292
+    /* "pyreadstat/_readstat_parser.pyx":298
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  *         pyformat = VAR_FORMAT_STRING             # <<<<<<<<<<<<<<
@@ -4270,7 +4293,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_STRING;
 
-    /* "pyreadstat/_readstat_parser.pyx":286
+    /* "pyreadstat/_readstat_parser.pyx":292
  * 
  *     # transform to values cython can deal with
  *     if var_type == READSTAT_TYPE_STRING or var_type == READSTAT_TYPE_STRING_REF:             # <<<<<<<<<<<<<<
@@ -4280,7 +4303,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     break;
     case READSTAT_TYPE_INT8:
 
-    /* "pyreadstat/_readstat_parser.pyx":294
+    /* "pyreadstat/_readstat_parser.pyx":300
  *         pyformat = VAR_FORMAT_STRING
  *     elif var_type == READSTAT_TYPE_INT8:
  *         c_int8_value = readstat_int8_value(value)             # <<<<<<<<<<<<<<
@@ -4289,7 +4312,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_c_int8_value = readstat_int8_value(__pyx_v_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":295
+    /* "pyreadstat/_readstat_parser.pyx":301
  *     elif var_type == READSTAT_TYPE_INT8:
  *         c_int8_value = readstat_int8_value(value)
  *         py_long_value = <long> c_int8_value             # <<<<<<<<<<<<<<
@@ -4298,7 +4321,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_py_long_value = ((long)__pyx_v_c_int8_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":296
+    /* "pyreadstat/_readstat_parser.pyx":302
  *         c_int8_value = readstat_int8_value(value)
  *         py_long_value = <long> c_int8_value
  *         pyformat = VAR_FORMAT_LONG             # <<<<<<<<<<<<<<
@@ -4307,7 +4330,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_LONG;
 
-    /* "pyreadstat/_readstat_parser.pyx":293
+    /* "pyreadstat/_readstat_parser.pyx":299
  *             py_str_value = ''
  *         pyformat = VAR_FORMAT_STRING
  *     elif var_type == READSTAT_TYPE_INT8:             # <<<<<<<<<<<<<<
@@ -4317,7 +4340,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     break;
     case READSTAT_TYPE_INT16:
 
-    /* "pyreadstat/_readstat_parser.pyx":298
+    /* "pyreadstat/_readstat_parser.pyx":304
  *         pyformat = VAR_FORMAT_LONG
  *     elif var_type == READSTAT_TYPE_INT16:
  *         c_int16_value = readstat_int16_value(value)             # <<<<<<<<<<<<<<
@@ -4326,7 +4349,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_c_int16_value = readstat_int16_value(__pyx_v_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":299
+    /* "pyreadstat/_readstat_parser.pyx":305
  *     elif var_type == READSTAT_TYPE_INT16:
  *         c_int16_value = readstat_int16_value(value)
  *         py_long_value = <long> c_int16_value             # <<<<<<<<<<<<<<
@@ -4335,7 +4358,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_py_long_value = ((long)__pyx_v_c_int16_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":300
+    /* "pyreadstat/_readstat_parser.pyx":306
  *         c_int16_value = readstat_int16_value(value)
  *         py_long_value = <long> c_int16_value
  *         pyformat = VAR_FORMAT_LONG             # <<<<<<<<<<<<<<
@@ -4344,7 +4367,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_LONG;
 
-    /* "pyreadstat/_readstat_parser.pyx":297
+    /* "pyreadstat/_readstat_parser.pyx":303
  *         py_long_value = <long> c_int8_value
  *         pyformat = VAR_FORMAT_LONG
  *     elif var_type == READSTAT_TYPE_INT16:             # <<<<<<<<<<<<<<
@@ -4354,7 +4377,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     break;
     case READSTAT_TYPE_INT32:
 
-    /* "pyreadstat/_readstat_parser.pyx":302
+    /* "pyreadstat/_readstat_parser.pyx":308
  *         pyformat = VAR_FORMAT_LONG
  *     elif var_type == READSTAT_TYPE_INT32:
  *         c_int32_value = readstat_int32_value(value)             # <<<<<<<<<<<<<<
@@ -4363,7 +4386,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_c_int32_value = readstat_int32_value(__pyx_v_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":303
+    /* "pyreadstat/_readstat_parser.pyx":309
  *     elif var_type == READSTAT_TYPE_INT32:
  *         c_int32_value = readstat_int32_value(value)
  *         py_long_value = <long> c_int32_value             # <<<<<<<<<<<<<<
@@ -4372,7 +4395,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_py_long_value = ((long)__pyx_v_c_int32_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":304
+    /* "pyreadstat/_readstat_parser.pyx":310
  *         c_int32_value = readstat_int32_value(value)
  *         py_long_value = <long> c_int32_value
  *         pyformat = VAR_FORMAT_LONG             # <<<<<<<<<<<<<<
@@ -4381,7 +4404,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_LONG;
 
-    /* "pyreadstat/_readstat_parser.pyx":301
+    /* "pyreadstat/_readstat_parser.pyx":307
  *         py_long_value = <long> c_int16_value
  *         pyformat = VAR_FORMAT_LONG
  *     elif var_type == READSTAT_TYPE_INT32:             # <<<<<<<<<<<<<<
@@ -4391,7 +4414,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     break;
     case READSTAT_TYPE_FLOAT:
 
-    /* "pyreadstat/_readstat_parser.pyx":306
+    /* "pyreadstat/_readstat_parser.pyx":312
  *         pyformat = VAR_FORMAT_LONG
  *     elif var_type == READSTAT_TYPE_FLOAT:
  *         c_float_value = readstat_float_value(value)             # <<<<<<<<<<<<<<
@@ -4400,7 +4423,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_c_float_value = readstat_float_value(__pyx_v_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":307
+    /* "pyreadstat/_readstat_parser.pyx":313
  *     elif var_type == READSTAT_TYPE_FLOAT:
  *         c_float_value = readstat_float_value(value)
  *         py_float_value = <double> c_float_value             # <<<<<<<<<<<<<<
@@ -4409,7 +4432,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_py_float_value = ((double)__pyx_v_c_float_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":308
+    /* "pyreadstat/_readstat_parser.pyx":314
  *         c_float_value = readstat_float_value(value)
  *         py_float_value = <double> c_float_value
  *         pyformat = VAR_FORMAT_FLOAT             # <<<<<<<<<<<<<<
@@ -4418,7 +4441,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_FLOAT;
 
-    /* "pyreadstat/_readstat_parser.pyx":305
+    /* "pyreadstat/_readstat_parser.pyx":311
  *         py_long_value = <long> c_int32_value
  *         pyformat = VAR_FORMAT_LONG
  *     elif var_type == READSTAT_TYPE_FLOAT:             # <<<<<<<<<<<<<<
@@ -4428,7 +4451,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     break;
     case READSTAT_TYPE_DOUBLE:
 
-    /* "pyreadstat/_readstat_parser.pyx":310
+    /* "pyreadstat/_readstat_parser.pyx":316
  *         pyformat = VAR_FORMAT_FLOAT
  *     elif var_type == READSTAT_TYPE_DOUBLE:
  *         c_double_value = readstat_double_value(value);             # <<<<<<<<<<<<<<
@@ -4437,7 +4460,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_c_double_value = readstat_double_value(__pyx_v_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":311
+    /* "pyreadstat/_readstat_parser.pyx":317
  *     elif var_type == READSTAT_TYPE_DOUBLE:
  *         c_double_value = readstat_double_value(value);
  *         py_float_value = <double> c_double_value             # <<<<<<<<<<<<<<
@@ -4446,7 +4469,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_py_float_value = ((double)__pyx_v_c_double_value);
 
-    /* "pyreadstat/_readstat_parser.pyx":312
+    /* "pyreadstat/_readstat_parser.pyx":318
  *         c_double_value = readstat_double_value(value);
  *         py_float_value = <double> c_double_value
  *         pyformat = VAR_FORMAT_FLOAT             # <<<<<<<<<<<<<<
@@ -4455,7 +4478,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  */
     __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_FLOAT;
 
-    /* "pyreadstat/_readstat_parser.pyx":309
+    /* "pyreadstat/_readstat_parser.pyx":315
  *         py_float_value = <double> c_float_value
  *         pyformat = VAR_FORMAT_FLOAT
  *     elif var_type == READSTAT_TYPE_DOUBLE:             # <<<<<<<<<<<<<<
@@ -4465,14 +4488,14 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     break;
     default:
 
-    /* "pyreadstat/_readstat_parser.pyx":314
+    /* "pyreadstat/_readstat_parser.pyx":320
  *         pyformat = VAR_FORMAT_FLOAT
  *     else:
  *         raise PyreadstatError("Unkown data type")             # <<<<<<<<<<<<<<
  * 
  *     # final transformation and storage
  */
-    __Pyx_GetModuleGlobalName(__pyx_t_1, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 314, __pyx_L1_error)
+    __Pyx_GetModuleGlobalName(__pyx_t_1, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 320, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_1);
     __pyx_t_7 = NULL;
     if (CYTHON_UNPACK_METHODS && unlikely(PyMethod_Check(__pyx_t_1))) {
@@ -4486,16 +4509,16 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     }
     __pyx_t_6 = (__pyx_t_7) ? __Pyx_PyObject_Call2Args(__pyx_t_1, __pyx_t_7, __pyx_kp_s_Unkown_data_type) : __Pyx_PyObject_CallOneArg(__pyx_t_1, __pyx_kp_s_Unkown_data_type);
     __Pyx_XDECREF(__pyx_t_7); __pyx_t_7 = 0;
-    if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 314, __pyx_L1_error)
+    if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 320, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_6);
     __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
     __Pyx_Raise(__pyx_t_6, 0, 0, 0);
     __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
-    __PYX_ERR(0, 314, __pyx_L1_error)
+    __PYX_ERR(0, 320, __pyx_L1_error)
     break;
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":318
+  /* "pyreadstat/_readstat_parser.pyx":324
  *     # final transformation and storage
  * 
  *     if pyformat == VAR_FORMAT_STRING:             # <<<<<<<<<<<<<<
@@ -4505,7 +4528,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
   switch (__pyx_v_pyformat) {
     case __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_STRING:
 
-    /* "pyreadstat/_readstat_parser.pyx":319
+    /* "pyreadstat/_readstat_parser.pyx":325
  * 
  *     if pyformat == VAR_FORMAT_STRING:
  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:             # <<<<<<<<<<<<<<
@@ -4523,18 +4546,18 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     __pyx_L5_bool_binop_done:;
     if (likely(__pyx_t_4)) {
 
-      /* "pyreadstat/_readstat_parser.pyx":320
+      /* "pyreadstat/_readstat_parser.pyx":326
  *     if pyformat == VAR_FORMAT_STRING:
  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:
  *             result = py_str_value             # <<<<<<<<<<<<<<
  *         else:
  *             #str_byte_val = py_str_value.encode("UTF-8")
  */
-      if (unlikely(!__pyx_v_py_str_value)) { __Pyx_RaiseUnboundLocalError("py_str_value"); __PYX_ERR(0, 320, __pyx_L1_error) }
+      if (unlikely(!__pyx_v_py_str_value)) { __Pyx_RaiseUnboundLocalError("py_str_value"); __PYX_ERR(0, 326, __pyx_L1_error) }
       __Pyx_INCREF(__pyx_v_py_str_value);
       __pyx_v_result = __pyx_v_py_str_value;
 
-      /* "pyreadstat/_readstat_parser.pyx":319
+      /* "pyreadstat/_readstat_parser.pyx":325
  * 
  *     if pyformat == VAR_FORMAT_STRING:
  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:             # <<<<<<<<<<<<<<
@@ -4544,7 +4567,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
       goto __pyx_L4;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":323
+    /* "pyreadstat/_readstat_parser.pyx":329
  *         else:
  *             #str_byte_val = py_str_value.encode("UTF-8")
  *             raise PyreadstatError("STRING type with value '%s' with date type in column '%s'" % (py_str_value, dc.col_names[index]))             # <<<<<<<<<<<<<<
@@ -4552,16 +4575,16 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:
  */
     /*else*/ {
-      __Pyx_GetModuleGlobalName(__pyx_t_1, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 323, __pyx_L1_error)
+      __Pyx_GetModuleGlobalName(__pyx_t_1, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 329, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_1);
-      if (unlikely(!__pyx_v_py_str_value)) { __Pyx_RaiseUnboundLocalError("py_str_value"); __PYX_ERR(0, 323, __pyx_L1_error) }
+      if (unlikely(!__pyx_v_py_str_value)) { __Pyx_RaiseUnboundLocalError("py_str_value"); __PYX_ERR(0, 329, __pyx_L1_error) }
       if (unlikely(__pyx_v_dc->col_names == Py_None)) {
         PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-        __PYX_ERR(0, 323, __pyx_L1_error)
+        __PYX_ERR(0, 329, __pyx_L1_error)
       }
-      __pyx_t_7 = __Pyx_GetItemInt_List(__pyx_v_dc->col_names, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 323, __pyx_L1_error)
+      __pyx_t_7 = __Pyx_GetItemInt_List(__pyx_v_dc->col_names, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 329, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_7);
-      __pyx_t_9 = PyTuple_New(2); if (unlikely(!__pyx_t_9)) __PYX_ERR(0, 323, __pyx_L1_error)
+      __pyx_t_9 = PyTuple_New(2); if (unlikely(!__pyx_t_9)) __PYX_ERR(0, 329, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_9);
       __Pyx_INCREF(__pyx_v_py_str_value);
       __Pyx_GIVEREF(__pyx_v_py_str_value);
@@ -4569,7 +4592,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
       __Pyx_GIVEREF(__pyx_t_7);
       PyTuple_SET_ITEM(__pyx_t_9, 1, __pyx_t_7);
       __pyx_t_7 = 0;
-      __pyx_t_7 = __Pyx_PyString_Format(__pyx_kp_s_STRING_type_with_value_s_with_da, __pyx_t_9); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 323, __pyx_L1_error)
+      __pyx_t_7 = __Pyx_PyString_Format(__pyx_kp_s_STRING_type_with_value_s_with_da, __pyx_t_9); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 329, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_7);
       __Pyx_DECREF(__pyx_t_9); __pyx_t_9 = 0;
       __pyx_t_9 = NULL;
@@ -4585,16 +4608,16 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
       __pyx_t_6 = (__pyx_t_9) ? __Pyx_PyObject_Call2Args(__pyx_t_1, __pyx_t_9, __pyx_t_7) : __Pyx_PyObject_CallOneArg(__pyx_t_1, __pyx_t_7);
       __Pyx_XDECREF(__pyx_t_9); __pyx_t_9 = 0;
       __Pyx_DECREF(__pyx_t_7); __pyx_t_7 = 0;
-      if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 323, __pyx_L1_error)
+      if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 329, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_6);
       __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
       __Pyx_Raise(__pyx_t_6, 0, 0, 0);
       __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
-      __PYX_ERR(0, 323, __pyx_L1_error)
+      __PYX_ERR(0, 329, __pyx_L1_error)
     }
     __pyx_L4:;
 
-    /* "pyreadstat/_readstat_parser.pyx":318
+    /* "pyreadstat/_readstat_parser.pyx":324
  *     # final transformation and storage
  * 
  *     if pyformat == VAR_FORMAT_STRING:             # <<<<<<<<<<<<<<
@@ -4604,7 +4627,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     break;
     case __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_LONG:
 
-    /* "pyreadstat/_readstat_parser.pyx":325
+    /* "pyreadstat/_readstat_parser.pyx":331
  *             raise PyreadstatError("STRING type with value '%s' with date type in column '%s'" % (py_str_value, dc.col_names[index]))
  *     elif pyformat == VAR_FORMAT_LONG:
  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:             # <<<<<<<<<<<<<<
@@ -4622,19 +4645,19 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     __pyx_L8_bool_binop_done:;
     if (__pyx_t_4) {
 
-      /* "pyreadstat/_readstat_parser.pyx":326
+      /* "pyreadstat/_readstat_parser.pyx":332
  *     elif pyformat == VAR_FORMAT_LONG:
  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:
  *             result = py_long_value             # <<<<<<<<<<<<<<
  *         else:
  *             tstamp = <double> py_long_value
  */
-      __pyx_t_6 = __Pyx_PyInt_From_long(__pyx_v_py_long_value); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 326, __pyx_L1_error)
+      __pyx_t_6 = __Pyx_PyInt_From_long(__pyx_v_py_long_value); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 332, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_6);
       __pyx_v_result = __pyx_t_6;
       __pyx_t_6 = 0;
 
-      /* "pyreadstat/_readstat_parser.pyx":325
+      /* "pyreadstat/_readstat_parser.pyx":331
  *             raise PyreadstatError("STRING type with value '%s' with date type in column '%s'" % (py_str_value, dc.col_names[index]))
  *     elif pyformat == VAR_FORMAT_LONG:
  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:             # <<<<<<<<<<<<<<
@@ -4644,7 +4667,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
       goto __pyx_L7;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":328
+    /* "pyreadstat/_readstat_parser.pyx":334
  *             result = py_long_value
  *         else:
  *             tstamp = <double> py_long_value             # <<<<<<<<<<<<<<
@@ -4654,21 +4677,21 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     /*else*/ {
       __pyx_v_tstamp = ((double)__pyx_v_py_long_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":329
+      /* "pyreadstat/_readstat_parser.pyx":335
  *         else:
  *             tstamp = <double> py_long_value
  *             result = transform_datetime(var_format, tstamp, file_format, origin, dates_as_pandas)             # <<<<<<<<<<<<<<
  *     elif pyformat == VAR_FORMAT_FLOAT:
  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:
  */
-      __pyx_t_6 = __pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__pyx_v_var_format, __pyx_v_tstamp, __pyx_v_file_format, __pyx_v_origin, __pyx_v_dates_as_pandas); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 329, __pyx_L1_error)
+      __pyx_t_6 = __pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__pyx_v_var_format, __pyx_v_tstamp, __pyx_v_file_format, __pyx_v_origin, __pyx_v_dates_as_pandas); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 335, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_6);
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     __pyx_L7:;
 
-    /* "pyreadstat/_readstat_parser.pyx":324
+    /* "pyreadstat/_readstat_parser.pyx":330
  *             #str_byte_val = py_str_value.encode("UTF-8")
  *             raise PyreadstatError("STRING type with value '%s' with date type in column '%s'" % (py_str_value, dc.col_names[index]))
  *     elif pyformat == VAR_FORMAT_LONG:             # <<<<<<<<<<<<<<
@@ -4678,7 +4701,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     break;
     case __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_FLOAT:
 
-    /* "pyreadstat/_readstat_parser.pyx":331
+    /* "pyreadstat/_readstat_parser.pyx":337
  *             result = transform_datetime(var_format, tstamp, file_format, origin, dates_as_pandas)
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  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:             # <<<<<<<<<<<<<<
@@ -4696,19 +4719,19 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     __pyx_L11_bool_binop_done:;
     if (__pyx_t_4) {
 
-      /* "pyreadstat/_readstat_parser.pyx":332
+      /* "pyreadstat/_readstat_parser.pyx":338
  *     elif pyformat == VAR_FORMAT_FLOAT:
  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:
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  *         else:
  *             #tstamp = <int> py_float_value
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-      __pyx_t_6 = PyFloat_FromDouble(__pyx_v_py_float_value); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 332, __pyx_L1_error)
+      __pyx_t_6 = PyFloat_FromDouble(__pyx_v_py_float_value); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 338, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_6);
       __pyx_v_result = __pyx_t_6;
       __pyx_t_6 = 0;
 
-      /* "pyreadstat/_readstat_parser.pyx":331
+      /* "pyreadstat/_readstat_parser.pyx":337
  *             result = transform_datetime(var_format, tstamp, file_format, origin, dates_as_pandas)
  *     elif pyformat == VAR_FORMAT_FLOAT:
  *         if var_format == DATE_FORMAT_NOTADATE or dc.no_datetime_conversion:             # <<<<<<<<<<<<<<
@@ -4718,7 +4741,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
       goto __pyx_L10;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":335
+    /* "pyreadstat/_readstat_parser.pyx":341
  *         else:
  *             #tstamp = <int> py_float_value
  *             tstamp = py_float_value             # <<<<<<<<<<<<<<
@@ -4728,21 +4751,21 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     /*else*/ {
       __pyx_v_tstamp = __pyx_v_py_float_value;
 
-      /* "pyreadstat/_readstat_parser.pyx":336
+      /* "pyreadstat/_readstat_parser.pyx":342
  *             #tstamp = <int> py_float_value
  *             tstamp = py_float_value
  *             result = transform_datetime(var_format, tstamp, file_format, origin, dates_as_pandas)             # <<<<<<<<<<<<<<
  *     #elif pyformat == VAR_FORMAT_MISSING:
  *     #    pass
  */
-      __pyx_t_6 = __pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__pyx_v_var_format, __pyx_v_tstamp, __pyx_v_file_format, __pyx_v_origin, __pyx_v_dates_as_pandas); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 336, __pyx_L1_error)
+      __pyx_t_6 = __pyx_f_10pyreadstat_16_readstat_parser_transform_datetime(__pyx_v_var_format, __pyx_v_tstamp, __pyx_v_file_format, __pyx_v_origin, __pyx_v_dates_as_pandas); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 342, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_6);
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       __pyx_t_6 = 0;
     }
     __pyx_L10:;
 
-    /* "pyreadstat/_readstat_parser.pyx":330
+    /* "pyreadstat/_readstat_parser.pyx":336
  *             tstamp = <double> py_long_value
  *             result = transform_datetime(var_format, tstamp, file_format, origin, dates_as_pandas)
  *     elif pyformat == VAR_FORMAT_FLOAT:             # <<<<<<<<<<<<<<
@@ -4752,14 +4775,14 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     break;
     default:
 
-    /* "pyreadstat/_readstat_parser.pyx":340
+    /* "pyreadstat/_readstat_parser.pyx":346
  *     #    pass
  *     else:
  *         raise PyreadstatError("Failed convert C to python value")             # <<<<<<<<<<<<<<
  * 
  *     return result
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-    __Pyx_GetModuleGlobalName(__pyx_t_1, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 340, __pyx_L1_error)
+    __Pyx_GetModuleGlobalName(__pyx_t_1, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 346, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_1);
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@@ -4773,16 +4796,16 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
     }
     __pyx_t_6 = (__pyx_t_7) ? __Pyx_PyObject_Call2Args(__pyx_t_1, __pyx_t_7, __pyx_kp_s_Failed_convert_C_to_python_value) : __Pyx_PyObject_CallOneArg(__pyx_t_1, __pyx_kp_s_Failed_convert_C_to_python_value);
     __Pyx_XDECREF(__pyx_t_7); __pyx_t_7 = 0;
-    if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 340, __pyx_L1_error)
+    if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 346, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_6);
     __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
     __Pyx_Raise(__pyx_t_6, 0, 0, 0);
     __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
-    __PYX_ERR(0, 340, __pyx_L1_error)
+    __PYX_ERR(0, 346, __pyx_L1_error)
     break;
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":342
+  /* "pyreadstat/_readstat_parser.pyx":348
  *         raise PyreadstatError("Failed convert C to python value")
  * 
  *     return result             # <<<<<<<<<<<<<<
@@ -4794,7 +4817,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
   __pyx_r = __pyx_v_result;
   goto __pyx_L0;
 
-  /* "pyreadstat/_readstat_parser.pyx":252
+  /* "pyreadstat/_readstat_parser.pyx":258
  * 
  * 
  * cdef object convert_readstat_to_python_value(readstat_value_t value, int index, data_container dc):             # <<<<<<<<<<<<<<
@@ -4819,7 +4842,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_pyt
   return __pyx_r;
 }
 
-/* "pyreadstat/_readstat_parser.pyx":345
+/* "pyreadstat/_readstat_parser.pyx":351
  * 
  * 
  * cdef int handle_metadata(readstat_metadata_t *metadata, void *ctx) except READSTAT_HANDLER_ABORT:             # <<<<<<<<<<<<<<
@@ -4849,7 +4872,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("handle_metadata", 0);
 
-  /* "pyreadstat/_readstat_parser.pyx":354
+  /* "pyreadstat/_readstat_parser.pyx":360
  * 
  *     cdef int var_count, obs_count
  *     cdef  data_container dc = <data_container> ctx             # <<<<<<<<<<<<<<
@@ -4861,7 +4884,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_v_dc = ((struct __pyx_obj_10pyreadstat_16_readstat_parser_data_container *)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":362
+  /* "pyreadstat/_readstat_parser.pyx":368
  *     cdef char * table
  * 
  *     metaonly = dc.metaonly             # <<<<<<<<<<<<<<
@@ -4871,7 +4894,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_t_2 = __pyx_v_dc->metaonly;
   __pyx_v_metaonly = __pyx_t_2;
 
-  /* "pyreadstat/_readstat_parser.pyx":364
+  /* "pyreadstat/_readstat_parser.pyx":370
  *     metaonly = dc.metaonly
  * 
  *     var_count = readstat_get_var_count(metadata)             # <<<<<<<<<<<<<<
@@ -4880,7 +4903,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
   __pyx_v_var_count = readstat_get_var_count(__pyx_v_metadata);
 
-  /* "pyreadstat/_readstat_parser.pyx":365
+  /* "pyreadstat/_readstat_parser.pyx":371
  * 
  *     var_count = readstat_get_var_count(metadata)
  *     if var_count<0:             # <<<<<<<<<<<<<<
@@ -4890,14 +4913,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_t_2 = ((__pyx_v_var_count < 0) != 0);
   if (unlikely(__pyx_t_2)) {
 
-    /* "pyreadstat/_readstat_parser.pyx":366
+    /* "pyreadstat/_readstat_parser.pyx":372
  *     var_count = readstat_get_var_count(metadata)
  *     if var_count<0:
  *         raise PyreadstatError("Failed to read number of variables")             # <<<<<<<<<<<<<<
  *     obs_count = readstat_get_row_count(metadata)
  *     if obs_count <0:
  */
-    __Pyx_GetModuleGlobalName(__pyx_t_3, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 366, __pyx_L1_error)
+    __Pyx_GetModuleGlobalName(__pyx_t_3, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 372, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_3);
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     if (CYTHON_UNPACK_METHODS && unlikely(PyMethod_Check(__pyx_t_3))) {
@@ -4911,14 +4934,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
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     __pyx_t_1 = (__pyx_t_4) ? __Pyx_PyObject_Call2Args(__pyx_t_3, __pyx_t_4, __pyx_kp_s_Failed_to_read_number_of_variabl) : __Pyx_PyObject_CallOneArg(__pyx_t_3, __pyx_kp_s_Failed_to_read_number_of_variabl);
     __Pyx_XDECREF(__pyx_t_4); __pyx_t_4 = 0;
-    if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 366, __pyx_L1_error)
+    if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 372, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_1);
     __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
     __Pyx_Raise(__pyx_t_1, 0, 0, 0);
     __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
-    __PYX_ERR(0, 366, __pyx_L1_error)
+    __PYX_ERR(0, 372, __pyx_L1_error)
 
-    /* "pyreadstat/_readstat_parser.pyx":365
+    /* "pyreadstat/_readstat_parser.pyx":371
  * 
  *     var_count = readstat_get_var_count(metadata)
  *     if var_count<0:             # <<<<<<<<<<<<<<
@@ -4927,7 +4950,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":367
+  /* "pyreadstat/_readstat_parser.pyx":373
  *     if var_count<0:
  *         raise PyreadstatError("Failed to read number of variables")
  *     obs_count = readstat_get_row_count(metadata)             # <<<<<<<<<<<<<<
@@ -4936,7 +4959,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
   __pyx_v_obs_count = readstat_get_row_count(__pyx_v_metadata);
 
-  /* "pyreadstat/_readstat_parser.pyx":368
+  /* "pyreadstat/_readstat_parser.pyx":374
  *         raise PyreadstatError("Failed to read number of variables")
  *     obs_count = readstat_get_row_count(metadata)
  *     if obs_count <0:             # <<<<<<<<<<<<<<
@@ -4946,7 +4969,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_t_2 = ((__pyx_v_obs_count < 0) != 0);
   if (__pyx_t_2) {
 
-    /* "pyreadstat/_readstat_parser.pyx":370
+    /* "pyreadstat/_readstat_parser.pyx":376
  *     if obs_count <0:
  *         # if <0 it means the number of rows is not known, allocate 100 000
  *         obs_count = 100000             # <<<<<<<<<<<<<<
@@ -4955,7 +4978,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
     __pyx_v_obs_count = 0x186A0;
 
-    /* "pyreadstat/_readstat_parser.pyx":371
+    /* "pyreadstat/_readstat_parser.pyx":377
  *         # if <0 it means the number of rows is not known, allocate 100 000
  *         obs_count = 100000
  *         dc.is_unkown_number_rows = 1             # <<<<<<<<<<<<<<
@@ -4964,7 +4987,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
     __pyx_v_dc->is_unkown_number_rows = 1;
 
-    /* "pyreadstat/_readstat_parser.pyx":368
+    /* "pyreadstat/_readstat_parser.pyx":374
  *         raise PyreadstatError("Failed to read number of variables")
  *     obs_count = readstat_get_row_count(metadata)
  *     if obs_count <0:             # <<<<<<<<<<<<<<
@@ -4973,7 +4996,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":373
+  /* "pyreadstat/_readstat_parser.pyx":379
  *         dc.is_unkown_number_rows = 1
  * 
  *     dc.n_obs = obs_count             # <<<<<<<<<<<<<<
@@ -4982,7 +5005,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
   __pyx_v_dc->n_obs = __pyx_v_obs_count;
 
-  /* "pyreadstat/_readstat_parser.pyx":374
+  /* "pyreadstat/_readstat_parser.pyx":380
  * 
  *     dc.n_obs = obs_count
  *     dc.n_vars = var_count             # <<<<<<<<<<<<<<
@@ -4991,16 +5014,16 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
   __pyx_v_dc->n_vars = __pyx_v_var_count;
 
-  /* "pyreadstat/_readstat_parser.pyx":376
+  /* "pyreadstat/_readstat_parser.pyx":382
  *     dc.n_vars = var_count
  * 
  *     dc.col_data_len = [obs_count] * var_count             # <<<<<<<<<<<<<<
  *     dc.col_numpy_dtypes = [None] * var_count
  *     dc.col_dytpes_isfloat = [0] * var_count
  */
-  __pyx_t_1 = __Pyx_PyInt_From_int(__pyx_v_obs_count); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 376, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_PyInt_From_int(__pyx_v_obs_count); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 382, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
-  __pyx_t_3 = PyList_New(1 * ((__pyx_v_var_count<0) ? 0:__pyx_v_var_count)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 376, __pyx_L1_error)
+  __pyx_t_3 = PyList_New(1 * ((__pyx_v_var_count<0) ? 0:__pyx_v_var_count)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 382, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_3);
   { Py_ssize_t __pyx_temp;
     for (__pyx_temp=0; __pyx_temp < __pyx_v_var_count; __pyx_temp++) {
@@ -5016,14 +5039,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_v_dc->col_data_len = ((PyObject*)__pyx_t_3);
   __pyx_t_3 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":377
+  /* "pyreadstat/_readstat_parser.pyx":383
  * 
  *     dc.col_data_len = [obs_count] * var_count
  *     dc.col_numpy_dtypes = [None] * var_count             # <<<<<<<<<<<<<<
  *     dc.col_dytpes_isfloat = [0] * var_count
  *     dc.col_dtypes_isobject = [0] * var_count
  */
-  __pyx_t_3 = PyList_New(1 * ((__pyx_v_var_count<0) ? 0:__pyx_v_var_count)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 377, __pyx_L1_error)
+  __pyx_t_3 = PyList_New(1 * ((__pyx_v_var_count<0) ? 0:__pyx_v_var_count)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 383, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_3);
   { Py_ssize_t __pyx_temp;
     for (__pyx_temp=0; __pyx_temp < __pyx_v_var_count; __pyx_temp++) {
@@ -5038,14 +5061,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_v_dc->col_numpy_dtypes = ((PyObject*)__pyx_t_3);
   __pyx_t_3 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":378
+  /* "pyreadstat/_readstat_parser.pyx":384
  *     dc.col_data_len = [obs_count] * var_count
  *     dc.col_numpy_dtypes = [None] * var_count
  *     dc.col_dytpes_isfloat = [0] * var_count             # <<<<<<<<<<<<<<
  *     dc.col_dtypes_isobject = [0] * var_count
  * 
  */
-  __pyx_t_3 = PyList_New(1 * ((__pyx_v_var_count<0) ? 0:__pyx_v_var_count)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 378, __pyx_L1_error)
+  __pyx_t_3 = PyList_New(1 * ((__pyx_v_var_count<0) ? 0:__pyx_v_var_count)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 384, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_3);
   { Py_ssize_t __pyx_temp;
     for (__pyx_temp=0; __pyx_temp < __pyx_v_var_count; __pyx_temp++) {
@@ -5060,14 +5083,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_v_dc->col_dytpes_isfloat = ((PyObject*)__pyx_t_3);
   __pyx_t_3 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":379
+  /* "pyreadstat/_readstat_parser.pyx":385
  *     dc.col_numpy_dtypes = [None] * var_count
  *     dc.col_dytpes_isfloat = [0] * var_count
  *     dc.col_dtypes_isobject = [0] * var_count             # <<<<<<<<<<<<<<
  * 
  *     # read other metadata
  */
-  __pyx_t_3 = PyList_New(1 * ((__pyx_v_var_count<0) ? 0:__pyx_v_var_count)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 379, __pyx_L1_error)
+  __pyx_t_3 = PyList_New(1 * ((__pyx_v_var_count<0) ? 0:__pyx_v_var_count)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 385, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_3);
   { Py_ssize_t __pyx_temp;
     for (__pyx_temp=0; __pyx_temp < __pyx_v_var_count; __pyx_temp++) {
@@ -5082,7 +5105,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_v_dc->col_dtypes_isobject = ((PyObject*)__pyx_t_3);
   __pyx_t_3 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":382
+  /* "pyreadstat/_readstat_parser.pyx":388
  * 
  *     # read other metadata
  *     flabel_orig = readstat_get_file_label(metadata);             # <<<<<<<<<<<<<<
@@ -5091,7 +5114,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
   __pyx_v_flabel_orig = readstat_get_file_label(__pyx_v_metadata);
 
-  /* "pyreadstat/_readstat_parser.pyx":383
+  /* "pyreadstat/_readstat_parser.pyx":389
  *     # read other metadata
  *     flabel_orig = readstat_get_file_label(metadata);
  *     fencoding_orig = readstat_get_file_encoding(metadata)             # <<<<<<<<<<<<<<
@@ -5100,7 +5123,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
   __pyx_v_fencoding_orig = readstat_get_file_encoding(__pyx_v_metadata);
 
-  /* "pyreadstat/_readstat_parser.pyx":384
+  /* "pyreadstat/_readstat_parser.pyx":390
  *     flabel_orig = readstat_get_file_label(metadata);
  *     fencoding_orig = readstat_get_file_encoding(metadata)
  *     if flabel_orig != NULL and flabel_orig[0]:             # <<<<<<<<<<<<<<
@@ -5118,14 +5141,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_L6_bool_binop_done:;
   if (__pyx_t_2) {
 
-    /* "pyreadstat/_readstat_parser.pyx":385
+    /* "pyreadstat/_readstat_parser.pyx":391
  *     fencoding_orig = readstat_get_file_encoding(metadata)
  *     if flabel_orig != NULL and flabel_orig[0]:
  *         flabel = <str> flabel_orig             # <<<<<<<<<<<<<<
  *     else:
  *         flabel = None
  */
-    __pyx_t_3 = __Pyx_PyStr_FromString(__pyx_v_flabel_orig); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 385, __pyx_L1_error)
+    __pyx_t_3 = __Pyx_PyStr_FromString(__pyx_v_flabel_orig); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 391, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_3);
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     __Pyx_INCREF(__pyx_t_1);
@@ -5133,7 +5156,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
     __pyx_v_flabel = ((PyObject*)__pyx_t_1);
     __pyx_t_1 = 0;
 
-    /* "pyreadstat/_readstat_parser.pyx":384
+    /* "pyreadstat/_readstat_parser.pyx":390
  *     flabel_orig = readstat_get_file_label(metadata);
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@@ -5143,7 +5166,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
     goto __pyx_L5;
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":387
+  /* "pyreadstat/_readstat_parser.pyx":393
  *         flabel = <str> flabel_orig
  *     else:
  *         flabel = None             # <<<<<<<<<<<<<<
@@ -5156,7 +5179,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   }
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-  /* "pyreadstat/_readstat_parser.pyx":388
+  /* "pyreadstat/_readstat_parser.pyx":394
  *     else:
  *         flabel = None
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@@ -5174,14 +5197,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_L9_bool_binop_done:;
   if (__pyx_t_2) {
 
-    /* "pyreadstat/_readstat_parser.pyx":389
+    /* "pyreadstat/_readstat_parser.pyx":395
  *         flabel = None
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  *         fencoding = <str> fencoding_orig             # <<<<<<<<<<<<<<
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-    __pyx_t_1 = __Pyx_PyStr_FromString(__pyx_v_fencoding_orig); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 389, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_PyStr_FromString(__pyx_v_fencoding_orig); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 395, __pyx_L1_error)
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     __Pyx_INCREF(__pyx_t_3);
@@ -5189,7 +5212,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
     __pyx_v_fencoding = ((PyObject*)__pyx_t_3);
     __pyx_t_3 = 0;
 
-    /* "pyreadstat/_readstat_parser.pyx":388
+    /* "pyreadstat/_readstat_parser.pyx":394
  *     else:
  *         flabel = None
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@@ -5199,7 +5222,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
     goto __pyx_L8;
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":391
+  /* "pyreadstat/_readstat_parser.pyx":397
  *         fencoding = <str> fencoding_orig
  *     else:
  *         fencoding = None             # <<<<<<<<<<<<<<
@@ -5212,7 +5235,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   }
   __pyx_L8:;
 
-  /* "pyreadstat/_readstat_parser.pyx":393
+  /* "pyreadstat/_readstat_parser.pyx":399
  *         fencoding = None
  * 
  *     dc.file_encoding = fencoding             # <<<<<<<<<<<<<<
@@ -5225,7 +5248,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __Pyx_DECREF(__pyx_v_dc->file_encoding);
   __pyx_v_dc->file_encoding = __pyx_v_fencoding;
 
-  /* "pyreadstat/_readstat_parser.pyx":394
+  /* "pyreadstat/_readstat_parser.pyx":400
  * 
  *     dc.file_encoding = fencoding
  *     dc.file_label = flabel             # <<<<<<<<<<<<<<
@@ -5238,7 +5261,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __Pyx_DECREF(__pyx_v_dc->file_label);
   __pyx_v_dc->file_label = __pyx_v_flabel;
 
-  /* "pyreadstat/_readstat_parser.pyx":396
+  /* "pyreadstat/_readstat_parser.pyx":402
  *     dc.file_label = flabel
  * 
  *     table = readstat_get_table_name(metadata)             # <<<<<<<<<<<<<<
@@ -5247,7 +5270,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
   __pyx_v_table = readstat_get_table_name(__pyx_v_metadata);
 
-  /* "pyreadstat/_readstat_parser.pyx":397
+  /* "pyreadstat/_readstat_parser.pyx":403
  * 
  *     table = readstat_get_table_name(metadata)
  *     if table != NULL and table[0]:             # <<<<<<<<<<<<<<
@@ -5265,14 +5288,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_L12_bool_binop_done:;
   if (__pyx_t_2) {
 
-    /* "pyreadstat/_readstat_parser.pyx":398
+    /* "pyreadstat/_readstat_parser.pyx":404
  *     table = readstat_get_table_name(metadata)
  *     if table != NULL and table[0]:
  *         dc.table_name = <str> table             # <<<<<<<<<<<<<<
  * 
  *     return READSTAT_HANDLER_OK
  */
-    __pyx_t_3 = __Pyx_PyStr_FromString(__pyx_v_table); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 398, __pyx_L1_error)
+    __pyx_t_3 = __Pyx_PyStr_FromString(__pyx_v_table); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 404, __pyx_L1_error)
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     __Pyx_INCREF(__pyx_t_1);
@@ -5283,7 +5306,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
     __pyx_v_dc->table_name = ((PyObject*)__pyx_t_1);
     __pyx_t_1 = 0;
 
-    /* "pyreadstat/_readstat_parser.pyx":397
+    /* "pyreadstat/_readstat_parser.pyx":403
  * 
  *     table = readstat_get_table_name(metadata)
  *     if table != NULL and table[0]:             # <<<<<<<<<<<<<<
@@ -5292,7 +5315,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
  */
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":400
+  /* "pyreadstat/_readstat_parser.pyx":406
  *         dc.table_name = <str> table
  * 
  *     return READSTAT_HANDLER_OK             # <<<<<<<<<<<<<<
@@ -5302,7 +5325,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   __pyx_r = READSTAT_HANDLER_OK;
   goto __pyx_L0;
 
-  /* "pyreadstat/_readstat_parser.pyx":345
+  /* "pyreadstat/_readstat_parser.pyx":351
  * 
  * 
  * cdef int handle_metadata(readstat_metadata_t *metadata, void *ctx) except READSTAT_HANDLER_ABORT:             # <<<<<<<<<<<<<<
@@ -5325,7 +5348,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_metadata(readstat_meta
   return __pyx_r;
 }
 
-/* "pyreadstat/_readstat_parser.pyx":402
+/* "pyreadstat/_readstat_parser.pyx":408
  *     return READSTAT_HANDLER_OK
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  * cdef int handle_variable(int index, readstat_variable_t *variable,             # <<<<<<<<<<<<<<
@@ -5385,7 +5408,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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   __Pyx_RefNannySetupContext("handle_variable", 0);
 
-  /* "pyreadstat/_readstat_parser.pyx":431
+  /* "pyreadstat/_readstat_parser.pyx":437
  *     cdef int dupcolcnt
  * 
  *     cdef  data_container dc = <data_container> ctx             # <<<<<<<<<<<<<<
@@ -5397,7 +5420,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   __pyx_v_dc = ((struct __pyx_obj_10pyreadstat_16_readstat_parser_data_container *)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":434
+  /* "pyreadstat/_readstat_parser.pyx":440
  * 
  *     # get variable name, label, format and type and put into our data container
  *     var_name = readstat_variable_get_name(variable)             # <<<<<<<<<<<<<<
@@ -5406,7 +5429,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
   __pyx_v_var_name = readstat_variable_get_name(__pyx_v_variable);
 
-  /* "pyreadstat/_readstat_parser.pyx":435
+  /* "pyreadstat/_readstat_parser.pyx":441
  *     # get variable name, label, format and type and put into our data container
  *     var_name = readstat_variable_get_name(variable)
  *     if var_name == NULL:             # <<<<<<<<<<<<<<
@@ -5416,7 +5439,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   __pyx_t_2 = ((__pyx_v_var_name == NULL) != 0);
   if (__pyx_t_2) {
 
-    /* "pyreadstat/_readstat_parser.pyx":436
+    /* "pyreadstat/_readstat_parser.pyx":442
  *     var_name = readstat_variable_get_name(variable)
  *     if var_name == NULL:
  *         col_name = None             # <<<<<<<<<<<<<<
@@ -5426,7 +5449,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __Pyx_INCREF(Py_None);
     __pyx_v_col_name = ((PyObject*)Py_None);
 
-    /* "pyreadstat/_readstat_parser.pyx":435
+    /* "pyreadstat/_readstat_parser.pyx":441
  *     # get variable name, label, format and type and put into our data container
  *     var_name = readstat_variable_get_name(variable)
  *     if var_name == NULL:             # <<<<<<<<<<<<<<
@@ -5436,7 +5459,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     goto __pyx_L3;
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":438
+  /* "pyreadstat/_readstat_parser.pyx":444
  *         col_name = None
  *     else:
  *         col_name = <str>var_name             # <<<<<<<<<<<<<<
@@ -5444,7 +5467,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  *     # if the user introduced a list of columns to include, continue only if the column is in the list
  */
   /*else*/ {
-    __pyx_t_1 = __Pyx_PyStr_FromString(__pyx_v_var_name); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 438, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_PyStr_FromString(__pyx_v_var_name); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 444, __pyx_L1_error)
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@@ -5454,7 +5477,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   }
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-  /* "pyreadstat/_readstat_parser.pyx":441
+  /* "pyreadstat/_readstat_parser.pyx":447
  * 
  *     # if the user introduced a list of columns to include, continue only if the column is in the list
  *     if dc.filter_cols and not (col_name in dc.use_cols):             # <<<<<<<<<<<<<<
@@ -5467,13 +5490,13 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __pyx_t_2 = __pyx_t_4;
     goto __pyx_L5_bool_binop_done;
   }
-  __pyx_t_4 = (__Pyx_PySequence_ContainsTF(__pyx_v_col_name, __pyx_v_dc->use_cols, Py_NE)); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 441, __pyx_L1_error)
+  __pyx_t_4 = (__Pyx_PySequence_ContainsTF(__pyx_v_col_name, __pyx_v_dc->use_cols, Py_NE)); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 447, __pyx_L1_error)
   __pyx_t_5 = (__pyx_t_4 != 0);
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   __pyx_L5_bool_binop_done:;
   if (__pyx_t_2) {
 
-    /* "pyreadstat/_readstat_parser.pyx":442
+    /* "pyreadstat/_readstat_parser.pyx":448
  *     # if the user introduced a list of columns to include, continue only if the column is in the list
  *     if dc.filter_cols and not (col_name in dc.use_cols):
  *         dc.n_vars -= 1             # <<<<<<<<<<<<<<
@@ -5482,7 +5505,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
     __pyx_v_dc->n_vars = (__pyx_v_dc->n_vars - 1);
 
-    /* "pyreadstat/_readstat_parser.pyx":443
+    /* "pyreadstat/_readstat_parser.pyx":449
  *     if dc.filter_cols and not (col_name in dc.use_cols):
  *         dc.n_vars -= 1
  *         return READSTAT_HANDLER_SKIP_VARIABLE             # <<<<<<<<<<<<<<
@@ -5492,7 +5515,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __pyx_r = READSTAT_HANDLER_SKIP_VARIABLE;
     goto __pyx_L0;
 
-    /* "pyreadstat/_readstat_parser.pyx":441
+    /* "pyreadstat/_readstat_parser.pyx":447
  * 
  *     # if the user introduced a list of columns to include, continue only if the column is in the list
  *     if dc.filter_cols and not (col_name in dc.use_cols):             # <<<<<<<<<<<<<<
@@ -5501,7 +5524,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":445
+  /* "pyreadstat/_readstat_parser.pyx":451
  *         return READSTAT_HANDLER_SKIP_VARIABLE
  * 
  *     index = readstat_variable_get_index_after_skipping(variable)             # <<<<<<<<<<<<<<
@@ -5510,18 +5533,18 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
   __pyx_v_index = readstat_variable_get_index_after_skipping(__pyx_v_variable);
 
-  /* "pyreadstat/_readstat_parser.pyx":447
+  /* "pyreadstat/_readstat_parser.pyx":453
  *     index = readstat_variable_get_index_after_skipping(variable)
  * 
  *     if col_name in dc.col_names:             # <<<<<<<<<<<<<<
  *         dupcolcnt = 1
  *         while True:
  */
-  __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_col_name, __pyx_v_dc->col_names, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 447, __pyx_L1_error)
+  __pyx_t_2 = (__Pyx_PySequence_ContainsTF(__pyx_v_col_name, __pyx_v_dc->col_names, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 453, __pyx_L1_error)
   __pyx_t_5 = (__pyx_t_2 != 0);
   if (__pyx_t_5) {
 
-    /* "pyreadstat/_readstat_parser.pyx":448
+    /* "pyreadstat/_readstat_parser.pyx":454
  * 
  *     if col_name in dc.col_names:
  *         dupcolcnt = 1             # <<<<<<<<<<<<<<
@@ -5530,7 +5553,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
     __pyx_v_dupcolcnt = 1;
 
-    /* "pyreadstat/_readstat_parser.pyx":449
+    /* "pyreadstat/_readstat_parser.pyx":455
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  *         while True:             # <<<<<<<<<<<<<<
@@ -5539,40 +5562,40 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
     while (1) {
 
-      /* "pyreadstat/_readstat_parser.pyx":450
+      /* "pyreadstat/_readstat_parser.pyx":456
  *         dupcolcnt = 1
  *         while True:
  *             newcolname = col_name + "_duplicated" + str(dupcolcnt)             # <<<<<<<<<<<<<<
  *             if newcolname in col_name:
  *                 dupcolcnt += 1
  */
-      __pyx_t_3 = PyNumber_Add(__pyx_v_col_name, __pyx_n_s_duplicated); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 450, __pyx_L1_error)
+      __pyx_t_3 = PyNumber_Add(__pyx_v_col_name, __pyx_n_s_duplicated); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 456, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_3);
-      __pyx_t_1 = __Pyx_PyInt_From_int(__pyx_v_dupcolcnt); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 450, __pyx_L1_error)
+      __pyx_t_1 = __Pyx_PyInt_From_int(__pyx_v_dupcolcnt); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 456, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_1);
-      __pyx_t_6 = __Pyx_PyObject_CallOneArg(((PyObject *)(&PyString_Type)), __pyx_t_1); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 450, __pyx_L1_error)
+      __pyx_t_6 = __Pyx_PyObject_CallOneArg(((PyObject *)(&PyString_Type)), __pyx_t_1); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 456, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_6);
       __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
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+      __pyx_t_1 = PyNumber_Add(__pyx_t_3, __pyx_t_6); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 456, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_1);
       __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
       __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
-      if (!(likely(PyString_CheckExact(__pyx_t_1))||((__pyx_t_1) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_t_1)->tp_name), 0))) __PYX_ERR(0, 450, __pyx_L1_error)
+      if (!(likely(PyString_CheckExact(__pyx_t_1))||((__pyx_t_1) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_t_1)->tp_name), 0))) __PYX_ERR(0, 456, __pyx_L1_error)
       __Pyx_XDECREF_SET(__pyx_v_newcolname, ((PyObject*)__pyx_t_1));
       __pyx_t_1 = 0;
 
-      /* "pyreadstat/_readstat_parser.pyx":451
+      /* "pyreadstat/_readstat_parser.pyx":457
  *         while True:
  *             newcolname = col_name + "_duplicated" + str(dupcolcnt)
  *             if newcolname in col_name:             # <<<<<<<<<<<<<<
  *                 dupcolcnt += 1
  *                 continue
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-      __pyx_t_5 = (__Pyx_PySequence_ContainsTF(__pyx_v_newcolname, __pyx_v_col_name, Py_EQ)); if (unlikely(__pyx_t_5 < 0)) __PYX_ERR(0, 451, __pyx_L1_error)
+      __pyx_t_5 = (__Pyx_PySequence_ContainsTF(__pyx_v_newcolname, __pyx_v_col_name, Py_EQ)); if (unlikely(__pyx_t_5 < 0)) __PYX_ERR(0, 457, __pyx_L1_error)
       __pyx_t_2 = (__pyx_t_5 != 0);
       if (__pyx_t_2) {
 
-        /* "pyreadstat/_readstat_parser.pyx":452
+        /* "pyreadstat/_readstat_parser.pyx":458
  *             newcolname = col_name + "_duplicated" + str(dupcolcnt)
  *             if newcolname in col_name:
  *                 dupcolcnt += 1             # <<<<<<<<<<<<<<
@@ -5581,7 +5604,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
         __pyx_v_dupcolcnt = (__pyx_v_dupcolcnt + 1);
 
-        /* "pyreadstat/_readstat_parser.pyx":453
+        /* "pyreadstat/_readstat_parser.pyx":459
  *             if newcolname in col_name:
  *                 dupcolcnt += 1
  *                 continue             # <<<<<<<<<<<<<<
@@ -5590,7 +5613,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
         goto __pyx_L8_continue;
 
-        /* "pyreadstat/_readstat_parser.pyx":451
+        /* "pyreadstat/_readstat_parser.pyx":457
  *         while True:
  *             newcolname = col_name + "_duplicated" + str(dupcolcnt)
  *             if newcolname in col_name:             # <<<<<<<<<<<<<<
@@ -5599,7 +5622,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
       }
 
-      /* "pyreadstat/_readstat_parser.pyx":455
+      /* "pyreadstat/_readstat_parser.pyx":461
  *                 continue
  *             else:
  *                 msg = "column '{0}' is duplicated, renamed to '{1}'".format(col_name, newcolname)             # <<<<<<<<<<<<<<
@@ -5607,7 +5630,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  *                 col_name = newcolname
  */
       /*else*/ {
-        __pyx_t_6 = __Pyx_PyObject_GetAttrStr(__pyx_kp_s_column_0_is_duplicated_renamed_t, __pyx_n_s_format); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 455, __pyx_L1_error)
+        __pyx_t_6 = __Pyx_PyObject_GetAttrStr(__pyx_kp_s_column_0_is_duplicated_renamed_t, __pyx_n_s_format); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 461, __pyx_L1_error)
         __Pyx_GOTREF(__pyx_t_6);
         __pyx_t_3 = NULL;
         __pyx_t_7 = 0;
@@ -5624,7 +5647,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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@@ -5632,13 +5655,13 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-          __pyx_t_8 = PyTuple_New(2+__pyx_t_7); if (unlikely(!__pyx_t_8)) __PYX_ERR(0, 455, __pyx_L1_error)
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@@ -5649,7 +5672,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-        /* "pyreadstat/_readstat_parser.pyx":456
+        /* "pyreadstat/_readstat_parser.pyx":462
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-        __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_warnings); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 456, __pyx_L1_error)
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@@ -5681,12 +5704,12 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-        if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 456, __pyx_L1_error)
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-        /* "pyreadstat/_readstat_parser.pyx":457
+        /* "pyreadstat/_readstat_parser.pyx":463
  *                 msg = "column '{0}' is duplicated, renamed to '{1}'".format(col_name, newcolname)
  *                 warnings.warn(msg)
  *                 col_name = newcolname             # <<<<<<<<<<<<<<
@@ -5696,7 +5719,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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         __Pyx_DECREF_SET(__pyx_v_col_name, __pyx_v_newcolname);
 
-        /* "pyreadstat/_readstat_parser.pyx":458
+        /* "pyreadstat/_readstat_parser.pyx":464
  *                 warnings.warn(msg)
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  *                 break             # <<<<<<<<<<<<<<
@@ -5709,7 +5732,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     }
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-    /* "pyreadstat/_readstat_parser.pyx":447
+    /* "pyreadstat/_readstat_parser.pyx":453
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  *     if col_name in dc.col_names:             # <<<<<<<<<<<<<<
@@ -5718,7 +5741,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":460
+  /* "pyreadstat/_readstat_parser.pyx":466
  *                 break
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@@ -5727,11 +5750,11 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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     PyErr_Format(PyExc_AttributeError, "'NoneType' object has no attribute '%.30s'", "append");
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-  __pyx_t_9 = __Pyx_PyList_Append(__pyx_v_dc->col_names, __pyx_v_col_name); if (unlikely(__pyx_t_9 == ((int)-1))) __PYX_ERR(0, 460, __pyx_L1_error)
+  __pyx_t_9 = __Pyx_PyList_Append(__pyx_v_dc->col_names, __pyx_v_col_name); if (unlikely(__pyx_t_9 == ((int)-1))) __PYX_ERR(0, 466, __pyx_L1_error)
 
-  /* "pyreadstat/_readstat_parser.pyx":463
+  /* "pyreadstat/_readstat_parser.pyx":469
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@@ -5741,14 +5764,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   __pyx_t_2 = ((__pyx_v_val_labels != NULL) != 0);
   if (__pyx_t_2) {
 
-    /* "pyreadstat/_readstat_parser.pyx":464
+    /* "pyreadstat/_readstat_parser.pyx":470
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-    __pyx_t_1 = __Pyx_PyStr_FromString(__pyx_v_val_labels); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 464, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_PyStr_FromString(__pyx_v_val_labels); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 470, __pyx_L1_error)
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@@ -5756,26 +5779,26 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __pyx_v_label_name = ((PyObject*)__pyx_t_8);
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-    /* "pyreadstat/_readstat_parser.pyx":465
+    /* "pyreadstat/_readstat_parser.pyx":471
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-      /* "pyreadstat/_readstat_parser.pyx":466
+      /* "pyreadstat/_readstat_parser.pyx":472
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-      if (unlikely(PyObject_SetItem(__pyx_v_dc->label_to_var_name, __pyx_v_col_name, __pyx_v_label_name) < 0)) __PYX_ERR(0, 466, __pyx_L1_error)
+      if (unlikely(PyObject_SetItem(__pyx_v_dc->label_to_var_name, __pyx_v_col_name, __pyx_v_label_name) < 0)) __PYX_ERR(0, 472, __pyx_L1_error)
 
-      /* "pyreadstat/_readstat_parser.pyx":465
+      /* "pyreadstat/_readstat_parser.pyx":471
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@@ -5784,7 +5807,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
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-    /* "pyreadstat/_readstat_parser.pyx":463
+    /* "pyreadstat/_readstat_parser.pyx":469
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  */
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":468
+  /* "pyreadstat/_readstat_parser.pyx":474
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@@ -5802,7 +5825,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-  /* "pyreadstat/_readstat_parser.pyx":469
+  /* "pyreadstat/_readstat_parser.pyx":475
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   __pyx_t_2 = ((__pyx_v_var_label == NULL) != 0);
   if (__pyx_t_2) {
 
-    /* "pyreadstat/_readstat_parser.pyx":470
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-    /* "pyreadstat/_readstat_parser.pyx":469
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     goto __pyx_L13;
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-  /* "pyreadstat/_readstat_parser.pyx":472
+  /* "pyreadstat/_readstat_parser.pyx":478
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@@ -5840,7 +5863,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-    __pyx_t_8 = __Pyx_PyStr_FromString(__pyx_v_var_label); if (unlikely(!__pyx_t_8)) __PYX_ERR(0, 472, __pyx_L1_error)
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@@ -5850,7 +5873,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-  /* "pyreadstat/_readstat_parser.pyx":473
+  /* "pyreadstat/_readstat_parser.pyx":479
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@@ -5859,11 +5882,11 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-  __pyx_t_9 = __Pyx_PyList_Append(__pyx_v_dc->col_labels, __pyx_v_col_label); if (unlikely(__pyx_t_9 == ((int)-1))) __PYX_ERR(0, 473, __pyx_L1_error)
+  __pyx_t_9 = __Pyx_PyList_Append(__pyx_v_dc->col_labels, __pyx_v_col_label); if (unlikely(__pyx_t_9 == ((int)-1))) __PYX_ERR(0, 479, __pyx_L1_error)
 
-  /* "pyreadstat/_readstat_parser.pyx":476
+  /* "pyreadstat/_readstat_parser.pyx":482
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@@ -5872,7 +5895,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-  /* "pyreadstat/_readstat_parser.pyx":477
+  /* "pyreadstat/_readstat_parser.pyx":483
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@@ -5882,7 +5905,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-    /* "pyreadstat/_readstat_parser.pyx":478
+    /* "pyreadstat/_readstat_parser.pyx":484
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@@ -5892,7 +5915,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-    /* "pyreadstat/_readstat_parser.pyx":477
+    /* "pyreadstat/_readstat_parser.pyx":483
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@@ -5902,7 +5925,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-  /* "pyreadstat/_readstat_parser.pyx":480
+  /* "pyreadstat/_readstat_parser.pyx":486
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@@ -5910,7 +5933,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-    __pyx_t_1 = __Pyx_PyStr_FromString(__pyx_v_var_format); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 480, __pyx_L1_error)
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@@ -5920,7 +5943,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-  /* "pyreadstat/_readstat_parser.pyx":481
+  /* "pyreadstat/_readstat_parser.pyx":487
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@@ -5930,7 +5953,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   __pyx_t_10 = __pyx_v_dc->file_format;
   __pyx_v_file_format = __pyx_t_10;
 
-  /* "pyreadstat/_readstat_parser.pyx":482
+  /* "pyreadstat/_readstat_parser.pyx":488
  *         col_format_original = <str>var_format
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  *     dc.col_formats_original.append(col_format_original)             # <<<<<<<<<<<<<<
@@ -5939,11 +5962,11 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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   if (unlikely(__pyx_v_dc->col_formats_original == Py_None)) {
     PyErr_Format(PyExc_AttributeError, "'NoneType' object has no attribute '%.30s'", "append");
-    __PYX_ERR(0, 482, __pyx_L1_error)
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-  __pyx_t_9 = __Pyx_PyList_Append(__pyx_v_dc->col_formats_original, __pyx_v_col_format_original); if (unlikely(__pyx_t_9 == ((int)-1))) __PYX_ERR(0, 482, __pyx_L1_error)
+  __pyx_t_9 = __Pyx_PyList_Append(__pyx_v_dc->col_formats_original, __pyx_v_col_format_original); if (unlikely(__pyx_t_9 == ((int)-1))) __PYX_ERR(0, 488, __pyx_L1_error)
 
-  /* "pyreadstat/_readstat_parser.pyx":483
+  /* "pyreadstat/_readstat_parser.pyx":489
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@@ -5952,7 +5975,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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   __pyx_v_col_format_final = __pyx_f_10pyreadstat_16_readstat_parser_transform_variable_format(__pyx_v_col_format_original, __pyx_v_file_format);
 
-  /* "pyreadstat/_readstat_parser.pyx":484
+  /* "pyreadstat/_readstat_parser.pyx":490
  *     dc.col_formats_original.append(col_format_original)
  *     col_format_final = transform_variable_format(col_format_original, file_format)
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@@ -5961,14 +5984,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-    __PYX_ERR(0, 484, __pyx_L1_error)
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+  __pyx_t_8 = __Pyx_PyInt_From___pyx_t_10pyreadstat_16_readstat_parser_py_datetime_format(__pyx_v_col_format_final); if (unlikely(!__pyx_t_8)) __PYX_ERR(0, 490, __pyx_L1_error)
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-  /* "pyreadstat/_readstat_parser.pyx":487
+  /* "pyreadstat/_readstat_parser.pyx":493
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-  /* "pyreadstat/_readstat_parser.pyx":490
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-    /* "pyreadstat/_readstat_parser.pyx":491
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-    /* "pyreadstat/_readstat_parser.pyx":490
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     goto __pyx_L15;
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@@ -6041,11 +6064,11 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-  /* "pyreadstat/_readstat_parser.pyx":495
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@@ -6080,23 +6103,23 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-  /* "pyreadstat/_readstat_parser.pyx":498
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-  __pyx_t_2 = __Pyx_PyObject_IsTrue(__pyx_t_1); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 498, __pyx_L1_error)
+  __pyx_t_1 = PyObject_RichCompare(__pyx_v_curnptype, __pyx_builtin_object, Py_EQ); __Pyx_XGOTREF(__pyx_t_1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 504, __pyx_L1_error)
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-    /* "pyreadstat/_readstat_parser.pyx":499
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@@ -6105,7 +6128,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-    /* "pyreadstat/_readstat_parser.pyx":498
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-  /* "pyreadstat/_readstat_parser.pyx":500
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-  __Pyx_GetModuleGlobalName(__pyx_t_1, __pyx_n_s_np); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 500, __pyx_L1_error)
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+  __pyx_t_1 = PyObject_RichCompare(__pyx_v_curnptype, __pyx_t_8, Py_EQ); __Pyx_XGOTREF(__pyx_t_1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 506, __pyx_L1_error)
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-  __pyx_t_2 = __Pyx_PyObject_IsTrue(__pyx_t_1); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 500, __pyx_L1_error)
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-    /* "pyreadstat/_readstat_parser.pyx":501
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@@ -6141,7 +6164,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-    /* "pyreadstat/_readstat_parser.pyx":500
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-  /* "pyreadstat/_readstat_parser.pyx":502
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-  /* "pyreadstat/_readstat_parser.pyx":503
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+  if (unlikely(__Pyx_SetItemInt(__pyx_v_dc->col_dytpes_isfloat, __pyx_v_index, __pyx_t_1, int, 1, __Pyx_PyInt_From_int, 1, 1, 1) < 0)) __PYX_ERR(0, 509, __pyx_L1_error)
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-  /* "pyreadstat/_readstat_parser.pyx":504
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  *     dc.col_dytpes_isfloat[index] = iscurnptypefloat
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@@ -6192,7 +6215,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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   __pyx_v_metaonly = __pyx_t_2;
 
-  /* "pyreadstat/_readstat_parser.pyx":506
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-    /* "pyreadstat/_readstat_parser.pyx":507
+    /* "pyreadstat/_readstat_parser.pyx":513
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-    __Pyx_GetModuleGlobalName(__pyx_t_1, __pyx_n_s_np); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 507, __pyx_L1_error)
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-    /* "pyreadstat/_readstat_parser.pyx":506
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     goto __pyx_L20;
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-  /* "pyreadstat/_readstat_parser.pyx":509
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-    /* "pyreadstat/_readstat_parser.pyx":510
+    /* "pyreadstat/_readstat_parser.pyx":516
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-    __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_np); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 510, __pyx_L1_error)
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-    /* "pyreadstat/_readstat_parser.pyx":511
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-      /* "pyreadstat/_readstat_parser.pyx":512
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-      __Pyx_GetModuleGlobalName(__pyx_t_8, __pyx_n_s_np); if (unlikely(!__pyx_t_8)) __PYX_ERR(0, 512, __pyx_L1_error)
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@@ -6320,12 +6343,12 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-      if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 512, __pyx_L1_error)
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-      /* "pyreadstat/_readstat_parser.pyx":511
+      /* "pyreadstat/_readstat_parser.pyx":517
  *         obs_count = dc.n_obs
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  *         if iscurnptypeobject or iscurnptypefloat:             # <<<<<<<<<<<<<<
@@ -6336,7 +6359,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   }
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-  /* "pyreadstat/_readstat_parser.pyx":513
+  /* "pyreadstat/_readstat_parser.pyx":519
  *         if iscurnptypeobject or iscurnptypefloat:
  *             row.fill(np.nan)
  *     dc.col_data.append(row)             # <<<<<<<<<<<<<<
@@ -6345,11 +6368,11 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-  /* "pyreadstat/_readstat_parser.pyx":516
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@@ -6359,7 +6382,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   __pyx_t_2 = (__pyx_v_dc->usernan != 0);
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-    /* "pyreadstat/_readstat_parser.pyx":517
+    /* "pyreadstat/_readstat_parser.pyx":523
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@@ -6368,7 +6391,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-    /* "pyreadstat/_readstat_parser.pyx":518
+    /* "pyreadstat/_readstat_parser.pyx":524
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@@ -6378,19 +6401,19 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-      /* "pyreadstat/_readstat_parser.pyx":519
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-      __pyx_t_3 = PyList_New(0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 519, __pyx_L1_error)
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-      /* "pyreadstat/_readstat_parser.pyx":520
+      /* "pyreadstat/_readstat_parser.pyx":526
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  *             for i in range(0, n_ranges):             # <<<<<<<<<<<<<<
@@ -6402,7 +6425,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-        /* "pyreadstat/_readstat_parser.pyx":521
+        /* "pyreadstat/_readstat_parser.pyx":527
  *             missing_ranges = list()
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@@ -6411,19 +6434,19 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-        /* "pyreadstat/_readstat_parser.pyx":522
+        /* "pyreadstat/_readstat_parser.pyx":528
  *             for i in range(0, n_ranges):
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  *                 pyloval = convert_readstat_to_python_value(loval, index, dc)             # <<<<<<<<<<<<<<
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  *                 pyhival = convert_readstat_to_python_value(hival, index, dc)
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-        __pyx_t_3 = __pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_python_value(__pyx_v_loval, __pyx_v_index, __pyx_v_dc); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 522, __pyx_L1_error)
+        __pyx_t_3 = __pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_python_value(__pyx_v_loval, __pyx_v_index, __pyx_v_dc); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 528, __pyx_L1_error)
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         __pyx_t_3 = 0;
 
-        /* "pyreadstat/_readstat_parser.pyx":523
+        /* "pyreadstat/_readstat_parser.pyx":529
  *                 loval = readstat_variable_get_missing_range_lo(variable, i)
  *                 pyloval = convert_readstat_to_python_value(loval, index, dc)
  *                 hival = readstat_variable_get_missing_range_hi(variable, i)             # <<<<<<<<<<<<<<
@@ -6432,34 +6455,34 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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-        /* "pyreadstat/_readstat_parser.pyx":524
+        /* "pyreadstat/_readstat_parser.pyx":530
  *                 pyloval = convert_readstat_to_python_value(loval, index, dc)
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  *                 pyhival = convert_readstat_to_python_value(hival, index, dc)             # <<<<<<<<<<<<<<
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+        __pyx_t_3 = __pyx_f_10pyreadstat_16_readstat_parser_convert_readstat_to_python_value(__pyx_v_hival, __pyx_v_index, __pyx_v_dc); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 530, __pyx_L1_error)
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         __pyx_t_3 = 0;
 
-        /* "pyreadstat/_readstat_parser.pyx":525
+        /* "pyreadstat/_readstat_parser.pyx":531
  *                 hival = readstat_variable_get_missing_range_hi(variable, i)
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-        __pyx_t_3 = __Pyx_PyDict_NewPresized(2); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 525, __pyx_L1_error)
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+        if (PyDict_SetItem(__pyx_t_3, __pyx_n_s_lo, __pyx_v_pyloval) < 0) __PYX_ERR(0, 531, __pyx_L1_error)
+        if (PyDict_SetItem(__pyx_t_3, __pyx_n_s_hi, __pyx_v_pyhival) < 0) __PYX_ERR(0, 531, __pyx_L1_error)
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-      /* "pyreadstat/_readstat_parser.pyx":526
+      /* "pyreadstat/_readstat_parser.pyx":532
  *                 pyhival = convert_readstat_to_python_value(hival, index, dc)
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  *             dc.missing_ranges[col_name] = missing_ranges             # <<<<<<<<<<<<<<
@@ -6468,11 +6491,11 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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       if (unlikely(__pyx_v_dc->missing_ranges == Py_None)) {
         PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-        __PYX_ERR(0, 526, __pyx_L1_error)
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-      if (unlikely(PyDict_SetItem(__pyx_v_dc->missing_ranges, __pyx_v_col_name, __pyx_v_missing_ranges) < 0)) __PYX_ERR(0, 526, __pyx_L1_error)
+      if (unlikely(PyDict_SetItem(__pyx_v_dc->missing_ranges, __pyx_v_col_name, __pyx_v_missing_ranges) < 0)) __PYX_ERR(0, 532, __pyx_L1_error)
 
-      /* "pyreadstat/_readstat_parser.pyx":518
+      /* "pyreadstat/_readstat_parser.pyx":524
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@@ -6481,7 +6504,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":516
+    /* "pyreadstat/_readstat_parser.pyx":522
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@@ -6490,7 +6513,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
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-  /* "pyreadstat/_readstat_parser.pyx":529
+  /* "pyreadstat/_readstat_parser.pyx":535
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  *     cdef size_t storage_width
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@@ -6499,35 +6522,35 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
   __pyx_v_storage_width = readstat_variable_get_storage_width(__pyx_v_variable);
 
-  /* "pyreadstat/_readstat_parser.pyx":530
+  /* "pyreadstat/_readstat_parser.pyx":536
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  *     dc.variable_storage_width[col_name] = <int>storage_width             # <<<<<<<<<<<<<<
  * 
  *     dc.variable_display_width[col_name] = readstat_variable_get_display_width(variable)
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-  __pyx_t_3 = __Pyx_PyInt_From_int(((int)__pyx_v_storage_width)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 530, __pyx_L1_error)
+  __pyx_t_3 = __Pyx_PyInt_From_int(((int)__pyx_v_storage_width)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 536, __pyx_L1_error)
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     PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
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+  if (unlikely(PyDict_SetItem(__pyx_v_dc->variable_storage_width, __pyx_v_col_name, __pyx_t_3) < 0)) __PYX_ERR(0, 536, __pyx_L1_error)
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-  /* "pyreadstat/_readstat_parser.pyx":532
+  /* "pyreadstat/_readstat_parser.pyx":538
  *     dc.variable_storage_width[col_name] = <int>storage_width
  * 
  *     dc.variable_display_width[col_name] = readstat_variable_get_display_width(variable)             # <<<<<<<<<<<<<<
  * 
  *     cdef readstat_alignment_t align
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-  __pyx_t_3 = __Pyx_PyInt_From_int(readstat_variable_get_display_width(__pyx_v_variable)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 532, __pyx_L1_error)
+  __pyx_t_3 = __Pyx_PyInt_From_int(readstat_variable_get_display_width(__pyx_v_variable)); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 538, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_3);
-  if (unlikely(PyObject_SetItem(__pyx_v_dc->variable_display_width, __pyx_v_col_name, __pyx_t_3) < 0)) __PYX_ERR(0, 532, __pyx_L1_error)
+  if (unlikely(PyObject_SetItem(__pyx_v_dc->variable_display_width, __pyx_v_col_name, __pyx_t_3) < 0)) __PYX_ERR(0, 538, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":536
+  /* "pyreadstat/_readstat_parser.pyx":542
  *     cdef readstat_alignment_t align
  *     cdef str pyalign
  *     align = readstat_variable_get_alignment(variable)             # <<<<<<<<<<<<<<
@@ -6536,7 +6559,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
   __pyx_v_align = readstat_variable_get_alignment(__pyx_v_variable);
 
-  /* "pyreadstat/_readstat_parser.pyx":537
+  /* "pyreadstat/_readstat_parser.pyx":543
  *     cdef str pyalign
  *     align = readstat_variable_get_alignment(variable)
  *     if align == READSTAT_ALIGNMENT_UNKNOWN:             # <<<<<<<<<<<<<<
@@ -6546,7 +6569,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   switch (__pyx_v_align) {
     case READSTAT_ALIGNMENT_UNKNOWN:
 
-    /* "pyreadstat/_readstat_parser.pyx":538
+    /* "pyreadstat/_readstat_parser.pyx":544
  *     align = readstat_variable_get_alignment(variable)
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  *         pyalign = "unknown"             # <<<<<<<<<<<<<<
@@ -6556,7 +6579,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
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     __pyx_v_pyalign = __pyx_n_s_unknown;
 
-    /* "pyreadstat/_readstat_parser.pyx":537
+    /* "pyreadstat/_readstat_parser.pyx":543
  *     cdef str pyalign
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  *     if align == READSTAT_ALIGNMENT_UNKNOWN:             # <<<<<<<<<<<<<<
@@ -6566,7 +6589,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     break;
     case READSTAT_ALIGNMENT_LEFT:
 
-    /* "pyreadstat/_readstat_parser.pyx":540
+    /* "pyreadstat/_readstat_parser.pyx":546
  *         pyalign = "unknown"
  *     elif align == READSTAT_ALIGNMENT_LEFT:
  *         pyalign = "left"             # <<<<<<<<<<<<<<
@@ -6576,7 +6599,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __Pyx_INCREF(__pyx_n_s_left);
     __pyx_v_pyalign = __pyx_n_s_left;
 
-    /* "pyreadstat/_readstat_parser.pyx":539
+    /* "pyreadstat/_readstat_parser.pyx":545
  *     if align == READSTAT_ALIGNMENT_UNKNOWN:
  *         pyalign = "unknown"
  *     elif align == READSTAT_ALIGNMENT_LEFT:             # <<<<<<<<<<<<<<
@@ -6586,7 +6609,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     break;
     case READSTAT_ALIGNMENT_CENTER:
 
-    /* "pyreadstat/_readstat_parser.pyx":542
+    /* "pyreadstat/_readstat_parser.pyx":548
  *         pyalign = "left"
  *     elif align == READSTAT_ALIGNMENT_CENTER:
  *         pyalign = "center"             # <<<<<<<<<<<<<<
@@ -6596,7 +6619,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __Pyx_INCREF(__pyx_n_s_center);
     __pyx_v_pyalign = __pyx_n_s_center;
 
-    /* "pyreadstat/_readstat_parser.pyx":541
+    /* "pyreadstat/_readstat_parser.pyx":547
  *     elif align == READSTAT_ALIGNMENT_LEFT:
  *         pyalign = "left"
  *     elif align == READSTAT_ALIGNMENT_CENTER:             # <<<<<<<<<<<<<<
@@ -6606,7 +6629,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     break;
     case READSTAT_ALIGNMENT_RIGHT:
 
-    /* "pyreadstat/_readstat_parser.pyx":544
+    /* "pyreadstat/_readstat_parser.pyx":550
  *         pyalign = "center"
  *     elif align == READSTAT_ALIGNMENT_RIGHT:
  *         pyalign = "right"             # <<<<<<<<<<<<<<
@@ -6616,7 +6639,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __Pyx_INCREF(__pyx_n_s_right);
     __pyx_v_pyalign = __pyx_n_s_right;
 
-    /* "pyreadstat/_readstat_parser.pyx":543
+    /* "pyreadstat/_readstat_parser.pyx":549
  *     elif align == READSTAT_ALIGNMENT_CENTER:
  *         pyalign = "center"
  *     elif align == READSTAT_ALIGNMENT_RIGHT:             # <<<<<<<<<<<<<<
@@ -6626,7 +6649,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     break;
     default:
 
-    /* "pyreadstat/_readstat_parser.pyx":546
+    /* "pyreadstat/_readstat_parser.pyx":552
  *         pyalign = "right"
  *     else:
  *         pyalign = "undetermined"             # <<<<<<<<<<<<<<
@@ -6638,16 +6661,16 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     break;
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":548
+  /* "pyreadstat/_readstat_parser.pyx":554
  *         pyalign = "undetermined"
  * 
  *     dc.variable_alignment[col_name] = pyalign             # <<<<<<<<<<<<<<
  * 
  *     cdef readstat_measure_t measure
  */
-  if (unlikely(PyObject_SetItem(__pyx_v_dc->variable_alignment, __pyx_v_col_name, __pyx_v_pyalign) < 0)) __PYX_ERR(0, 548, __pyx_L1_error)
+  if (unlikely(PyObject_SetItem(__pyx_v_dc->variable_alignment, __pyx_v_col_name, __pyx_v_pyalign) < 0)) __PYX_ERR(0, 554, __pyx_L1_error)
 
-  /* "pyreadstat/_readstat_parser.pyx":552
+  /* "pyreadstat/_readstat_parser.pyx":558
  *     cdef readstat_measure_t measure
  *     cdef str pymeasure
  *     measure = readstat_variable_get_measure(variable)             # <<<<<<<<<<<<<<
@@ -6656,7 +6679,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
  */
   __pyx_v_measure = readstat_variable_get_measure(__pyx_v_variable);
 
-  /* "pyreadstat/_readstat_parser.pyx":553
+  /* "pyreadstat/_readstat_parser.pyx":559
  *     cdef str pymeasure
  *     measure = readstat_variable_get_measure(variable)
  *     if measure == READSTAT_MEASURE_UNKNOWN:             # <<<<<<<<<<<<<<
@@ -6666,7 +6689,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   switch (__pyx_v_measure) {
     case READSTAT_MEASURE_UNKNOWN:
 
-    /* "pyreadstat/_readstat_parser.pyx":554
+    /* "pyreadstat/_readstat_parser.pyx":560
  *     measure = readstat_variable_get_measure(variable)
  *     if measure == READSTAT_MEASURE_UNKNOWN:
  *         pymeasure = "unknown"             # <<<<<<<<<<<<<<
@@ -6676,7 +6699,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __Pyx_INCREF(__pyx_n_s_unknown);
     __pyx_v_pymeasure = __pyx_n_s_unknown;
 
-    /* "pyreadstat/_readstat_parser.pyx":553
+    /* "pyreadstat/_readstat_parser.pyx":559
  *     cdef str pymeasure
  *     measure = readstat_variable_get_measure(variable)
  *     if measure == READSTAT_MEASURE_UNKNOWN:             # <<<<<<<<<<<<<<
@@ -6686,7 +6709,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     break;
     case READSTAT_MEASURE_NOMINAL:
 
-    /* "pyreadstat/_readstat_parser.pyx":556
+    /* "pyreadstat/_readstat_parser.pyx":562
  *         pymeasure = "unknown"
  *     elif measure == READSTAT_MEASURE_NOMINAL:
  *         pymeasure = "nominal"             # <<<<<<<<<<<<<<
@@ -6696,7 +6719,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __Pyx_INCREF(__pyx_n_s_nominal);
     __pyx_v_pymeasure = __pyx_n_s_nominal;
 
-    /* "pyreadstat/_readstat_parser.pyx":555
+    /* "pyreadstat/_readstat_parser.pyx":561
  *     if measure == READSTAT_MEASURE_UNKNOWN:
  *         pymeasure = "unknown"
  *     elif measure == READSTAT_MEASURE_NOMINAL:             # <<<<<<<<<<<<<<
@@ -6706,7 +6729,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     break;
     case READSTAT_MEASURE_ORDINAL:
 
-    /* "pyreadstat/_readstat_parser.pyx":558
+    /* "pyreadstat/_readstat_parser.pyx":564
  *         pymeasure = "nominal"
  *     elif measure == READSTAT_MEASURE_ORDINAL:
  *         pymeasure = "ordinal"             # <<<<<<<<<<<<<<
@@ -6716,7 +6739,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __Pyx_INCREF(__pyx_n_s_ordinal);
     __pyx_v_pymeasure = __pyx_n_s_ordinal;
 
-    /* "pyreadstat/_readstat_parser.pyx":557
+    /* "pyreadstat/_readstat_parser.pyx":563
  *     elif measure == READSTAT_MEASURE_NOMINAL:
  *         pymeasure = "nominal"
  *     elif measure == READSTAT_MEASURE_ORDINAL:             # <<<<<<<<<<<<<<
@@ -6726,7 +6749,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     break;
     case READSTAT_MEASURE_SCALE:
 
-    /* "pyreadstat/_readstat_parser.pyx":560
+    /* "pyreadstat/_readstat_parser.pyx":566
  *         pymeasure = "ordinal"
  *     elif measure == READSTAT_MEASURE_SCALE:
  *         pymeasure = "scale"             # <<<<<<<<<<<<<<
@@ -6736,7 +6759,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     __Pyx_INCREF(__pyx_n_s_scale);
     __pyx_v_pymeasure = __pyx_n_s_scale;
 
-    /* "pyreadstat/_readstat_parser.pyx":559
+    /* "pyreadstat/_readstat_parser.pyx":565
  *     elif measure == READSTAT_MEASURE_ORDINAL:
  *         pymeasure = "ordinal"
  *     elif measure == READSTAT_MEASURE_SCALE:             # <<<<<<<<<<<<<<
@@ -6746,7 +6769,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     break;
     default:
 
-    /* "pyreadstat/_readstat_parser.pyx":562
+    /* "pyreadstat/_readstat_parser.pyx":568
  *         pymeasure = "scale"
  *     else:
  *         pymeasure = "undetermined"             # <<<<<<<<<<<<<<
@@ -6758,16 +6781,16 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
     break;
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":564
+  /* "pyreadstat/_readstat_parser.pyx":570
  *         pymeasure = "undetermined"
  * 
  *     dc.variable_measure[col_name] = pymeasure             # <<<<<<<<<<<<<<
  * 
  *     return READSTAT_HANDLER_OK
  */
-  if (unlikely(PyObject_SetItem(__pyx_v_dc->variable_measure, __pyx_v_col_name, __pyx_v_pymeasure) < 0)) __PYX_ERR(0, 564, __pyx_L1_error)
+  if (unlikely(PyObject_SetItem(__pyx_v_dc->variable_measure, __pyx_v_col_name, __pyx_v_pymeasure) < 0)) __PYX_ERR(0, 570, __pyx_L1_error)
 
-  /* "pyreadstat/_readstat_parser.pyx":566
+  /* "pyreadstat/_readstat_parser.pyx":572
  *     dc.variable_measure[col_name] = pymeasure
  * 
  *     return READSTAT_HANDLER_OK             # <<<<<<<<<<<<<<
@@ -6777,7 +6800,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   __pyx_r = READSTAT_HANDLER_OK;
   goto __pyx_L0;
 
-  /* "pyreadstat/_readstat_parser.pyx":402
+  /* "pyreadstat/_readstat_parser.pyx":408
  *     return READSTAT_HANDLER_OK
  * 
  * cdef int handle_variable(int index, readstat_variable_t *variable,             # <<<<<<<<<<<<<<
@@ -6812,7 +6835,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_variable(int __pyx_v_i
   return __pyx_r;
 }
 
-/* "pyreadstat/_readstat_parser.pyx":569
+/* "pyreadstat/_readstat_parser.pyx":575
  * 
  * 
  * cdef int handle_value(int obs_index, readstat_variable_t * variable, readstat_value_t value, void *ctx) except READSTAT_HANDLER_ABORT:             # <<<<<<<<<<<<<<
@@ -6849,7 +6872,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("handle_value", 0);
 
-  /* "pyreadstat/_readstat_parser.pyx":591
+  /* "pyreadstat/_readstat_parser.pyx":597
  * 
  *     # extract variables we need from data container
  *     dc = <data_container> ctx             # <<<<<<<<<<<<<<
@@ -6861,7 +6884,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
   __pyx_v_dc = ((struct __pyx_obj_10pyreadstat_16_readstat_parser_data_container *)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":592
+  /* "pyreadstat/_readstat_parser.pyx":598
  *     # extract variables we need from data container
  *     dc = <data_container> ctx
  *     index = readstat_variable_get_index_after_skipping(variable)             # <<<<<<<<<<<<<<
@@ -6870,7 +6893,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
  */
   __pyx_v_index = readstat_variable_get_index_after_skipping(__pyx_v_variable);
 
-  /* "pyreadstat/_readstat_parser.pyx":593
+  /* "pyreadstat/_readstat_parser.pyx":599
  *     dc = <data_container> ctx
  *     index = readstat_variable_get_index_after_skipping(variable)
  *     max_n_obs = dc.max_n_obs             # <<<<<<<<<<<<<<
@@ -6880,7 +6903,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
   __pyx_t_2 = __pyx_v_dc->max_n_obs;
   __pyx_v_max_n_obs = __pyx_t_2;
 
-  /* "pyreadstat/_readstat_parser.pyx":594
+  /* "pyreadstat/_readstat_parser.pyx":600
  *     index = readstat_variable_get_index_after_skipping(variable)
  *     max_n_obs = dc.max_n_obs
  *     is_unkown_number_rows = dc.is_unkown_number_rows             # <<<<<<<<<<<<<<
@@ -6890,7 +6913,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
   __pyx_t_3 = __pyx_v_dc->is_unkown_number_rows;
   __pyx_v_is_unkown_number_rows = __pyx_t_3;
 
-  /* "pyreadstat/_readstat_parser.pyx":600
+  /* "pyreadstat/_readstat_parser.pyx":606
  *     # check that we still have enough room in our pre-allocated lists
  *     # if not, add more room
  *     iscurnptypeobject = dc.col_dtypes_isobject[index]             # <<<<<<<<<<<<<<
@@ -6899,15 +6922,15 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
  */
   if (unlikely(__pyx_v_dc->col_dtypes_isobject == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-    __PYX_ERR(0, 600, __pyx_L1_error)
+    __PYX_ERR(0, 606, __pyx_L1_error)
   }
-  __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_dtypes_isobject, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 600, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_dtypes_isobject, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 606, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
-  __pyx_t_3 = __Pyx_PyObject_IsTrue(__pyx_t_1); if (unlikely((__pyx_t_3 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 600, __pyx_L1_error)
+  __pyx_t_3 = __Pyx_PyObject_IsTrue(__pyx_t_1); if (unlikely((__pyx_t_3 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 606, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
   __pyx_v_iscurnptypeobject = __pyx_t_3;
 
-  /* "pyreadstat/_readstat_parser.pyx":601
+  /* "pyreadstat/_readstat_parser.pyx":607
  *     # if not, add more room
  *     iscurnptypeobject = dc.col_dtypes_isobject[index]
  *     iscurnptypefloat = dc.col_dytpes_isfloat[index]             # <<<<<<<<<<<<<<
@@ -6916,15 +6939,15 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
  */
   if (unlikely(__pyx_v_dc->col_dytpes_isfloat == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-    __PYX_ERR(0, 601, __pyx_L1_error)
+    __PYX_ERR(0, 607, __pyx_L1_error)
   }
-  __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_dytpes_isfloat, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 601, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_dytpes_isfloat, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 607, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
-  __pyx_t_3 = __Pyx_PyObject_IsTrue(__pyx_t_1); if (unlikely((__pyx_t_3 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 601, __pyx_L1_error)
+  __pyx_t_3 = __Pyx_PyObject_IsTrue(__pyx_t_1); if (unlikely((__pyx_t_3 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 607, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
   __pyx_v_iscurnptypefloat = __pyx_t_3;
 
-  /* "pyreadstat/_readstat_parser.pyx":602
+  /* "pyreadstat/_readstat_parser.pyx":608
  *     iscurnptypeobject = dc.col_dtypes_isobject[index]
  *     iscurnptypefloat = dc.col_dytpes_isfloat[index]
  *     if is_unkown_number_rows:             # <<<<<<<<<<<<<<
@@ -6934,7 +6957,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
   __pyx_t_3 = (__pyx_v_is_unkown_number_rows != 0);
   if (__pyx_t_3) {
 
-    /* "pyreadstat/_readstat_parser.pyx":603
+    /* "pyreadstat/_readstat_parser.pyx":609
  *     iscurnptypefloat = dc.col_dytpes_isfloat[index]
  *     if is_unkown_number_rows:
  *         if max_n_obs <= obs_index:             # <<<<<<<<<<<<<<
@@ -6944,7 +6967,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
     __pyx_t_3 = ((__pyx_v_max_n_obs <= __pyx_v_obs_index) != 0);
     if (__pyx_t_3) {
 
-      /* "pyreadstat/_readstat_parser.pyx":604
+      /* "pyreadstat/_readstat_parser.pyx":610
  *     if is_unkown_number_rows:
  *         if max_n_obs <= obs_index:
  *             dc.max_n_obs = obs_index + 1             # <<<<<<<<<<<<<<
@@ -6953,7 +6976,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
  */
       __pyx_v_dc->max_n_obs = (__pyx_v_obs_index + 1);
 
-      /* "pyreadstat/_readstat_parser.pyx":603
+      /* "pyreadstat/_readstat_parser.pyx":609
  *     iscurnptypefloat = dc.col_dytpes_isfloat[index]
  *     if is_unkown_number_rows:
  *         if max_n_obs <= obs_index:             # <<<<<<<<<<<<<<
@@ -6962,7 +6985,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
  */
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":605
+    /* "pyreadstat/_readstat_parser.pyx":611
  *         if max_n_obs <= obs_index:
  *             dc.max_n_obs = obs_index + 1
  *         var_max_rows = dc.col_data_len[index]             # <<<<<<<<<<<<<<
@@ -6971,15 +6994,15 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
  */
     if (unlikely(__pyx_v_dc->col_data_len == Py_None)) {
       PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-      __PYX_ERR(0, 605, __pyx_L1_error)
+      __PYX_ERR(0, 611, __pyx_L1_error)
     }
-    __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_data_len, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 605, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_data_len, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 611, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_1);
-    __pyx_t_2 = __Pyx_PyInt_As_int(__pyx_t_1); if (unlikely((__pyx_t_2 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 605, __pyx_L1_error)
+    __pyx_t_2 = __Pyx_PyInt_As_int(__pyx_t_1); if (unlikely((__pyx_t_2 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 611, __pyx_L1_error)
     __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
     __pyx_v_var_max_rows = __pyx_t_2;
 
-    /* "pyreadstat/_readstat_parser.pyx":606
+    /* "pyreadstat/_readstat_parser.pyx":612
  *             dc.max_n_obs = obs_index + 1
  *         var_max_rows = dc.col_data_len[index]
  *         if var_max_rows <= obs_index:             # <<<<<<<<<<<<<<
@@ -6989,7 +7012,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
     __pyx_t_3 = ((__pyx_v_var_max_rows <= __pyx_v_obs_index) != 0);
     if (__pyx_t_3) {
 
-      /* "pyreadstat/_readstat_parser.pyx":607
+      /* "pyreadstat/_readstat_parser.pyx":613
  *         var_max_rows = dc.col_data_len[index]
  *         if var_max_rows <= obs_index:
  *             curnptype = dc.col_numpy_dtypes[index]             # <<<<<<<<<<<<<<
@@ -6998,36 +7021,36 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
  */
       if (unlikely(__pyx_v_dc->col_numpy_dtypes == Py_None)) {
         PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-        __PYX_ERR(0, 607, __pyx_L1_error)
+        __PYX_ERR(0, 613, __pyx_L1_error)
       }
-      __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_numpy_dtypes, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 607, __pyx_L1_error)
+      __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_dc->col_numpy_dtypes, __pyx_v_index, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 613, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_1);
       __pyx_v_curnptype = __pyx_t_1;
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-        /* "pyreadstat/_readstat_parser.pyx":629
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-      /* "pyreadstat/_readstat_parser.pyx":618
+      /* "pyreadstat/_readstat_parser.pyx":624
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@@ -7349,7 +7372,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
       goto __pyx_L10;
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-    /* "pyreadstat/_readstat_parser.pyx":631
+    /* "pyreadstat/_readstat_parser.pyx":637
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-      /* "pyreadstat/_readstat_parser.pyx":633
+      /* "pyreadstat/_readstat_parser.pyx":639
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-      /* "pyreadstat/_readstat_parser.pyx":634
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-    /* "pyreadstat/_readstat_parser.pyx":635
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-      /* "pyreadstat/_readstat_parser.pyx":636
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-      /* "pyreadstat/_readstat_parser.pyx":638
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-      /* "pyreadstat/_readstat_parser.pyx":641
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-        /* "pyreadstat/_readstat_parser.pyx":641
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-      /* "pyreadstat/_readstat_parser.pyx":644
+      /* "pyreadstat/_readstat_parser.pyx":650
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@@ -7485,11 +7508,11 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
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-        /* "pyreadstat/_readstat_parser.pyx":645
+        /* "pyreadstat/_readstat_parser.pyx":651
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@@ -7498,11 +7521,11 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
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-        /* "pyreadstat/_readstat_parser.pyx":646
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@@ -7511,11 +7534,11 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
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-        /* "pyreadstat/_readstat_parser.pyx":647
+        /* "pyreadstat/_readstat_parser.pyx":653
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@@ -7524,7 +7547,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
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         __pyx_v_iscurnptypeobject = 1;
 
-        /* "pyreadstat/_readstat_parser.pyx":648
+        /* "pyreadstat/_readstat_parser.pyx":654
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  *                 dc.col_data[index] = dc.col_data[index].astype(object, copy=False)             # <<<<<<<<<<<<<<
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-      /* "pyreadstat/_readstat_parser.pyx":650
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-      /* "pyreadstat/_readstat_parser.pyx":651
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-        /* "pyreadstat/_readstat_parser.pyx":652
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-        /* "pyreadstat/_readstat_parser.pyx":651
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@@ -7630,7 +7653,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
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-      /* "pyreadstat/_readstat_parser.pyx":653
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-      /* "pyreadstat/_readstat_parser.pyx":654
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-      /* "pyreadstat/_readstat_parser.pyx":635
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-  /* "pyreadstat/_readstat_parser.pyx":656
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-    /* "pyreadstat/_readstat_parser.pyx":657
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-  /* "pyreadstat/_readstat_parser.pyx":659
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-  /* "pyreadstat/_readstat_parser.pyx":569
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@@ -7753,7 +7776,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value(int __pyx_v_obs_
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-  /* "pyreadstat/_readstat_parser.pyx":668
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-  /* "pyreadstat/_readstat_parser.pyx":686
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-  /* "pyreadstat/_readstat_parser.pyx":687
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-  /* "pyreadstat/_readstat_parser.pyx":690
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-  /* "pyreadstat/_readstat_parser.pyx":692
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-  /* "pyreadstat/_readstat_parser.pyx":693
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@@ -7875,36 +7898,36 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
   }
   __pyx_t_1 = (__pyx_t_3) ? __Pyx_PyObject_Call2Args(__pyx_t_2, __pyx_t_3, __pyx_v_var_label) : __Pyx_PyObject_CallOneArg(__pyx_t_2, __pyx_v_var_label);
   __Pyx_XDECREF(__pyx_t_3); __pyx_t_3 = 0;
-  if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 693, __pyx_L1_error)
+  if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 699, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
   __pyx_v_cur_dict = __pyx_t_1;
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":694
+  /* "pyreadstat/_readstat_parser.pyx":700
  *     labels_raw = dc.labels_raw
  *     cur_dict = labels_raw.get(var_label)
  *     if not cur_dict:             # <<<<<<<<<<<<<<
  *         cur_dict = dict()
  * 
  */
-  __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_cur_dict); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 694, __pyx_L1_error)
+  __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_cur_dict); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 700, __pyx_L1_error)
   __pyx_t_5 = ((!__pyx_t_4) != 0);
   if (__pyx_t_5) {
 
-    /* "pyreadstat/_readstat_parser.pyx":695
+    /* "pyreadstat/_readstat_parser.pyx":701
  *     cur_dict = labels_raw.get(var_label)
  *     if not cur_dict:
  *         cur_dict = dict()             # <<<<<<<<<<<<<<
  * 
  *     if readstat_value_is_tagged_missing(value):
  */
-    __pyx_t_1 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 695, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 701, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_1);
     __Pyx_DECREF_SET(__pyx_v_cur_dict, __pyx_t_1);
     __pyx_t_1 = 0;
 
-    /* "pyreadstat/_readstat_parser.pyx":694
+    /* "pyreadstat/_readstat_parser.pyx":700
  *     labels_raw = dc.labels_raw
  *     cur_dict = labels_raw.get(var_label)
  *     if not cur_dict:             # <<<<<<<<<<<<<<
@@ -7913,7 +7936,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":697
+  /* "pyreadstat/_readstat_parser.pyx":703
  *         cur_dict = dict()
  * 
  *     if readstat_value_is_tagged_missing(value):             # <<<<<<<<<<<<<<
@@ -7923,7 +7946,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
   __pyx_t_5 = (readstat_value_is_tagged_missing(__pyx_v_value) != 0);
   if (__pyx_t_5) {
 
-    /* "pyreadstat/_readstat_parser.pyx":699
+    /* "pyreadstat/_readstat_parser.pyx":705
  *     if readstat_value_is_tagged_missing(value):
  *         # SAS and Stata missing values
  *         missing_tag = <int> readstat_value_tag(value)             # <<<<<<<<<<<<<<
@@ -7932,22 +7955,22 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
     __pyx_v_missing_tag = ((int)readstat_value_tag(__pyx_v_value));
 
-    /* "pyreadstat/_readstat_parser.pyx":701
+    /* "pyreadstat/_readstat_parser.pyx":707
  *         missing_tag = <int> readstat_value_tag(value)
  *         # In SAS missing values are A to Z or _ in stata a to z
  *         cur_dict[chr(missing_tag)] = value_label_name             # <<<<<<<<<<<<<<
  *     else:
  * 
  */
-    __pyx_t_1 = __Pyx_PyInt_From_int(__pyx_v_missing_tag); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 701, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_PyInt_From_int(__pyx_v_missing_tag); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 707, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_1);
-    __pyx_t_2 = __Pyx_PyObject_CallOneArg(__pyx_builtin_chr, __pyx_t_1); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 701, __pyx_L1_error)
+    __pyx_t_2 = __Pyx_PyObject_CallOneArg(__pyx_builtin_chr, __pyx_t_1); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 707, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_2);
     __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
-    if (unlikely(PyObject_SetItem(__pyx_v_cur_dict, __pyx_t_2, __pyx_v_value_label_name) < 0)) __PYX_ERR(0, 701, __pyx_L1_error)
+    if (unlikely(PyObject_SetItem(__pyx_v_cur_dict, __pyx_t_2, __pyx_v_value_label_name) < 0)) __PYX_ERR(0, 707, __pyx_L1_error)
     __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-    /* "pyreadstat/_readstat_parser.pyx":697
+    /* "pyreadstat/_readstat_parser.pyx":703
  *         cur_dict = dict()
  * 
  *     if readstat_value_is_tagged_missing(value):             # <<<<<<<<<<<<<<
@@ -7957,7 +7980,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
     goto __pyx_L4;
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":704
+  /* "pyreadstat/_readstat_parser.pyx":710
  *     else:
  * 
  *         if value_type == READSTAT_TYPE_STRING or value_type == READSTAT_TYPE_STRING_REF:             # <<<<<<<<<<<<<<
@@ -7966,7 +7989,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
   /*else*/ {
 
-    /* "pyreadstat/_readstat_parser.pyx":724
+    /* "pyreadstat/_readstat_parser.pyx":730
  *             py_float_value = <double> c_float_value
  *             pyformat = VAR_FORMAT_FLOAT
  *         elif value_type == READSTAT_TYPE_DOUBLE:             # <<<<<<<<<<<<<<
@@ -7976,7 +7999,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
     switch (__pyx_v_value_type) {
       case READSTAT_TYPE_STRING:
 
-      /* "pyreadstat/_readstat_parser.pyx":704
+      /* "pyreadstat/_readstat_parser.pyx":710
  *     else:
  * 
  *         if value_type == READSTAT_TYPE_STRING or value_type == READSTAT_TYPE_STRING_REF:             # <<<<<<<<<<<<<<
@@ -7985,7 +8008,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       case READSTAT_TYPE_STRING_REF:
 
-      /* "pyreadstat/_readstat_parser.pyx":705
+      /* "pyreadstat/_readstat_parser.pyx":711
  * 
  *         if value_type == READSTAT_TYPE_STRING or value_type == READSTAT_TYPE_STRING_REF:
  *             c_str_value = readstat_string_value(value)             # <<<<<<<<<<<<<<
@@ -7994,14 +8017,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_c_str_value = readstat_string_value(__pyx_v_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":706
+      /* "pyreadstat/_readstat_parser.pyx":712
  *         if value_type == READSTAT_TYPE_STRING or value_type == READSTAT_TYPE_STRING_REF:
  *             c_str_value = readstat_string_value(value)
  *             py_str_value = <str> c_str_value             # <<<<<<<<<<<<<<
  *             pyformat = VAR_FORMAT_STRING
  *         elif value_type == READSTAT_TYPE_INT8:
  */
-      __pyx_t_2 = __Pyx_PyStr_FromString(__pyx_v_c_str_value); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 706, __pyx_L1_error)
+      __pyx_t_2 = __Pyx_PyStr_FromString(__pyx_v_c_str_value); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 712, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_2);
       __pyx_t_1 = __pyx_t_2;
       __Pyx_INCREF(__pyx_t_1);
@@ -8009,7 +8032,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
       __pyx_v_py_str_value = ((PyObject*)__pyx_t_1);
       __pyx_t_1 = 0;
 
-      /* "pyreadstat/_readstat_parser.pyx":707
+      /* "pyreadstat/_readstat_parser.pyx":713
  *             c_str_value = readstat_string_value(value)
  *             py_str_value = <str> c_str_value
  *             pyformat = VAR_FORMAT_STRING             # <<<<<<<<<<<<<<
@@ -8018,7 +8041,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_STRING;
 
-      /* "pyreadstat/_readstat_parser.pyx":704
+      /* "pyreadstat/_readstat_parser.pyx":710
  *     else:
  * 
  *         if value_type == READSTAT_TYPE_STRING or value_type == READSTAT_TYPE_STRING_REF:             # <<<<<<<<<<<<<<
@@ -8028,7 +8051,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
       break;
       case READSTAT_TYPE_INT8:
 
-      /* "pyreadstat/_readstat_parser.pyx":709
+      /* "pyreadstat/_readstat_parser.pyx":715
  *             pyformat = VAR_FORMAT_STRING
  *         elif value_type == READSTAT_TYPE_INT8:
  *             c_int8_value = readstat_int8_value(value)             # <<<<<<<<<<<<<<
@@ -8037,7 +8060,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_c_int8_value = readstat_int8_value(__pyx_v_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":710
+      /* "pyreadstat/_readstat_parser.pyx":716
  *         elif value_type == READSTAT_TYPE_INT8:
  *             c_int8_value = readstat_int8_value(value)
  *             py_long_value = <long> c_int8_value             # <<<<<<<<<<<<<<
@@ -8046,7 +8069,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_py_long_value = ((long)__pyx_v_c_int8_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":711
+      /* "pyreadstat/_readstat_parser.pyx":717
  *             c_int8_value = readstat_int8_value(value)
  *             py_long_value = <long> c_int8_value
  *             pyformat = VAR_FORMAT_LONG             # <<<<<<<<<<<<<<
@@ -8055,7 +8078,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_LONG;
 
-      /* "pyreadstat/_readstat_parser.pyx":708
+      /* "pyreadstat/_readstat_parser.pyx":714
  *             py_str_value = <str> c_str_value
  *             pyformat = VAR_FORMAT_STRING
  *         elif value_type == READSTAT_TYPE_INT8:             # <<<<<<<<<<<<<<
@@ -8065,7 +8088,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
       break;
       case READSTAT_TYPE_INT16:
 
-      /* "pyreadstat/_readstat_parser.pyx":713
+      /* "pyreadstat/_readstat_parser.pyx":719
  *             pyformat = VAR_FORMAT_LONG
  *         elif value_type == READSTAT_TYPE_INT16:
  *             c_int16_value = readstat_int16_value(value)             # <<<<<<<<<<<<<<
@@ -8074,7 +8097,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_c_int16_value = readstat_int16_value(__pyx_v_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":714
+      /* "pyreadstat/_readstat_parser.pyx":720
  *         elif value_type == READSTAT_TYPE_INT16:
  *             c_int16_value = readstat_int16_value(value)
  *             py_long_value = <long> c_int16_value             # <<<<<<<<<<<<<<
@@ -8083,7 +8106,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_py_long_value = ((long)__pyx_v_c_int16_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":715
+      /* "pyreadstat/_readstat_parser.pyx":721
  *             c_int16_value = readstat_int16_value(value)
  *             py_long_value = <long> c_int16_value
  *             pyformat = VAR_FORMAT_LONG             # <<<<<<<<<<<<<<
@@ -8092,7 +8115,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_LONG;
 
-      /* "pyreadstat/_readstat_parser.pyx":712
+      /* "pyreadstat/_readstat_parser.pyx":718
  *             py_long_value = <long> c_int8_value
  *             pyformat = VAR_FORMAT_LONG
  *         elif value_type == READSTAT_TYPE_INT16:             # <<<<<<<<<<<<<<
@@ -8102,7 +8125,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
       break;
       case READSTAT_TYPE_INT32:
 
-      /* "pyreadstat/_readstat_parser.pyx":717
+      /* "pyreadstat/_readstat_parser.pyx":723
  *             pyformat = VAR_FORMAT_LONG
  *         elif value_type == READSTAT_TYPE_INT32:
  *             c_int32_value = readstat_int32_value(value)             # <<<<<<<<<<<<<<
@@ -8111,7 +8134,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_c_int32_value = readstat_int32_value(__pyx_v_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":718
+      /* "pyreadstat/_readstat_parser.pyx":724
  *         elif value_type == READSTAT_TYPE_INT32:
  *             c_int32_value = readstat_int32_value(value)
  *             py_long_value = <long> c_int32_value             # <<<<<<<<<<<<<<
@@ -8120,7 +8143,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_py_long_value = ((long)__pyx_v_c_int32_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":719
+      /* "pyreadstat/_readstat_parser.pyx":725
  *             c_int32_value = readstat_int32_value(value)
  *             py_long_value = <long> c_int32_value
  *             pyformat = VAR_FORMAT_LONG             # <<<<<<<<<<<<<<
@@ -8129,7 +8152,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_LONG;
 
-      /* "pyreadstat/_readstat_parser.pyx":716
+      /* "pyreadstat/_readstat_parser.pyx":722
  *             py_long_value = <long> c_int16_value
  *             pyformat = VAR_FORMAT_LONG
  *         elif value_type == READSTAT_TYPE_INT32:             # <<<<<<<<<<<<<<
@@ -8139,7 +8162,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
       break;
       case READSTAT_TYPE_FLOAT:
 
-      /* "pyreadstat/_readstat_parser.pyx":721
+      /* "pyreadstat/_readstat_parser.pyx":727
  *             pyformat = VAR_FORMAT_LONG
  *         elif value_type == READSTAT_TYPE_FLOAT:
  *             c_float_value = readstat_float_value(value)             # <<<<<<<<<<<<<<
@@ -8148,7 +8171,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_c_float_value = readstat_float_value(__pyx_v_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":722
+      /* "pyreadstat/_readstat_parser.pyx":728
  *         elif value_type == READSTAT_TYPE_FLOAT:
  *             c_float_value = readstat_float_value(value)
  *             py_float_value = <double> c_float_value             # <<<<<<<<<<<<<<
@@ -8157,7 +8180,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_py_float_value = ((double)__pyx_v_c_float_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":723
+      /* "pyreadstat/_readstat_parser.pyx":729
  *             c_float_value = readstat_float_value(value)
  *             py_float_value = <double> c_float_value
  *             pyformat = VAR_FORMAT_FLOAT             # <<<<<<<<<<<<<<
@@ -8166,7 +8189,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_FLOAT;
 
-      /* "pyreadstat/_readstat_parser.pyx":720
+      /* "pyreadstat/_readstat_parser.pyx":726
  *             py_long_value = <long> c_int32_value
  *             pyformat = VAR_FORMAT_LONG
  *         elif value_type == READSTAT_TYPE_FLOAT:             # <<<<<<<<<<<<<<
@@ -8176,7 +8199,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
       break;
       case READSTAT_TYPE_DOUBLE:
 
-      /* "pyreadstat/_readstat_parser.pyx":725
+      /* "pyreadstat/_readstat_parser.pyx":731
  *             pyformat = VAR_FORMAT_FLOAT
  *         elif value_type == READSTAT_TYPE_DOUBLE:
  *             c_double_value = readstat_double_value(value);             # <<<<<<<<<<<<<<
@@ -8185,7 +8208,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_c_double_value = readstat_double_value(__pyx_v_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":726
+      /* "pyreadstat/_readstat_parser.pyx":732
  *         elif value_type == READSTAT_TYPE_DOUBLE:
  *             c_double_value = readstat_double_value(value);
  *             py_float_value = <double> c_double_value             # <<<<<<<<<<<<<<
@@ -8194,7 +8217,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_py_float_value = ((double)__pyx_v_c_double_value);
 
-      /* "pyreadstat/_readstat_parser.pyx":727
+      /* "pyreadstat/_readstat_parser.pyx":733
  *             c_double_value = readstat_double_value(value);
  *             py_float_value = <double> c_double_value
  *             pyformat = VAR_FORMAT_FLOAT             # <<<<<<<<<<<<<<
@@ -8203,7 +8226,7 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
  */
       __pyx_v_pyformat = __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_FLOAT;
 
-      /* "pyreadstat/_readstat_parser.pyx":724
+      /* "pyreadstat/_readstat_parser.pyx":730
  *             py_float_value = <double> c_float_value
  *             pyformat = VAR_FORMAT_FLOAT
  *         elif value_type == READSTAT_TYPE_DOUBLE:             # <<<<<<<<<<<<<<
@@ -8213,14 +8236,14 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
       break;
       default:
 
-      /* "pyreadstat/_readstat_parser.pyx":729
+      /* "pyreadstat/_readstat_parser.pyx":735
  *             pyformat = VAR_FORMAT_FLOAT
  *         else:
  *             raise PyreadstatError("Unkown data type")             # <<<<<<<<<<<<<<
  * 
  * 
  */
-      __Pyx_GetModuleGlobalName(__pyx_t_2, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 729, __pyx_L1_error)
+      __Pyx_GetModuleGlobalName(__pyx_t_2, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 735, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_2);
       __pyx_t_3 = NULL;
       if (CYTHON_UNPACK_METHODS && unlikely(PyMethod_Check(__pyx_t_2))) {
@@ -8234,16 +8257,16 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
       }
       __pyx_t_1 = (__pyx_t_3) ? __Pyx_PyObject_Call2Args(__pyx_t_2, __pyx_t_3, __pyx_kp_s_Unkown_data_type) : __Pyx_PyObject_CallOneArg(__pyx_t_2, __pyx_kp_s_Unkown_data_type);
       __Pyx_XDECREF(__pyx_t_3); __pyx_t_3 = 0;
-      if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 729, __pyx_L1_error)
+      if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 735, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_1);
       __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
       __Pyx_Raise(__pyx_t_1, 0, 0, 0);
       __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
-      __PYX_ERR(0, 729, __pyx_L1_error)
+      __PYX_ERR(0, 735, __pyx_L1_error)
       break;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":732
+    /* "pyreadstat/_readstat_parser.pyx":738
  * 
  * 
  *         if pyformat == VAR_FORMAT_STRING:             # <<<<<<<<<<<<<<
@@ -8253,17 +8276,17 @@ static int __pyx_f_10pyreadstat_16_readstat_parser_handle_value_label(char *__py
     switch (__pyx_v_pyformat) {
       case __pyx_e_10pyreadstat_16_readstat_parser_VAR_FORMAT_STRING:
 
-      /* "pyreadstat/_readstat_parser.pyx":733
+      /* "pyreadstat/_readstat_parser.pyx":739
  * 
  *         if pyformat == VAR_FORMAT_STRING:
  *             cur_dict[py_str_value] = value_label_name             # <<<<<<<<<<<<<<
  *         elif pyformat == VAR_FORMAT_LONG:
  *             cur_dict[py_long_value] = value_label_name
  */
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-    /* "pyreadstat/_readstat_parser.pyx":777
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-    /* "pyreadstat/_readstat_parser.pyx":778
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-  /* "pyreadstat/_readstat_parser.pyx":825
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-  /* "pyreadstat/_readstat_parser.pyx":826
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  *     check_exit_status(readstat_set_metadata_handler(parser, metadata_handler))             # <<<<<<<<<<<<<<
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-  /* "pyreadstat/_readstat_parser.pyx":833
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-  /* "pyreadstat/_readstat_parser.pyx":834
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  *     check_exit_status(readstat_set_note_handler(parser, note_handler))
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-  /* "pyreadstat/_readstat_parser.pyx":835
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-    /* "pyreadstat/_readstat_parser.pyx":841
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-    /* "pyreadstat/_readstat_parser.pyx":839
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-    /* "pyreadstat/_readstat_parser.pyx":847
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-    /* "pyreadstat/_readstat_parser.pyx":846
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-    /* "pyreadstat/_readstat_parser.pyx":851
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-    /* "pyreadstat/_readstat_parser.pyx":852
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-    /* "pyreadstat/_readstat_parser.pyx":850
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+    __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_set_row_limit(__pyx_v_parser, __pyx_v_row_limit)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 861, __pyx_L1_error)
 
-    /* "pyreadstat/_readstat_parser.pyx":854
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@@ -9079,7 +9102,7 @@ static void __pyx_f_10pyreadstat_16_readstat_parser_run_readstat_parser(char *__
  */
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-  /* "pyreadstat/_readstat_parser.pyx":857
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@@ -9089,16 +9112,16 @@ static void __pyx_f_10pyreadstat_16_readstat_parser_run_readstat_parser(char *__
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-    /* "pyreadstat/_readstat_parser.pyx":858
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+    __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_set_row_offset(__pyx_v_parser, __pyx_v_row_offset)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 864, __pyx_L1_error)
 
-    /* "pyreadstat/_readstat_parser.pyx":857
+    /* "pyreadstat/_readstat_parser.pyx":863
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  */
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-  /* "pyreadstat/_readstat_parser.pyx":861
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-  /* "pyreadstat/_readstat_parser.pyx":862
+  /* "pyreadstat/_readstat_parser.pyx":868
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@@ -9125,7 +9148,7 @@ static void __pyx_f_10pyreadstat_16_readstat_parser_run_readstat_parser(char *__
  */
   readstat_parser_free(__pyx_v_parser);
 
-  /* "pyreadstat/_readstat_parser.pyx":865
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   __pyx_v_pyerr = PyErr_Occurred();
 
-  /* "pyreadstat/_readstat_parser.pyx":866
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@@ -9144,16 +9167,16 @@ static void __pyx_f_10pyreadstat_16_readstat_parser_run_readstat_parser(char *__
   __pyx_t_1 = ((((void *)__pyx_v_pyerr) == NULL) != 0);
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-    /* "pyreadstat/_readstat_parser.pyx":867
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-    /* "pyreadstat/_readstat_parser.pyx":866
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@@ -9162,7 +9185,7 @@ static void __pyx_f_10pyreadstat_16_readstat_parser_run_readstat_parser(char *__
  */
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-  /* "pyreadstat/_readstat_parser.pyx":800
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  * 
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@@ -9182,7 +9205,7 @@ static void __pyx_f_10pyreadstat_16_readstat_parser_run_readstat_parser(char *__
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@@ -9215,14 +9238,14 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
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-  /* "pyreadstat/_readstat_parser.pyx":884
+  /* "pyreadstat/_readstat_parser.pyx":890
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-  __Pyx_GetModuleGlobalName(__pyx_t_2, __pyx_n_s_OrderedDict); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 884, __pyx_L1_error)
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@@ -9236,13 +9259,13 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
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-  if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 884, __pyx_L1_error)
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   __pyx_v_final_container = __pyx_t_1;
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":885
+  /* "pyreadstat/_readstat_parser.pyx":891
  * 
  *     final_container = OrderedDict()
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@@ -9254,7 +9277,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
   __pyx_v_col_data = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":886
+  /* "pyreadstat/_readstat_parser.pyx":892
  *     final_container = OrderedDict()
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  *     col_names = data.col_names             # <<<<<<<<<<<<<<
@@ -9266,7 +9289,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
   __pyx_v_col_names = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":887
+  /* "pyreadstat/_readstat_parser.pyx":893
  *     col_data = data.col_data
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  *     is_unkown_number_rows = data.is_unkown_number_rows             # <<<<<<<<<<<<<<
@@ -9276,7 +9299,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
   __pyx_t_4 = __pyx_v_data->is_unkown_number_rows;
   __pyx_v_is_unkown_number_rows = __pyx_t_4;
 
-  /* "pyreadstat/_readstat_parser.pyx":888
+  /* "pyreadstat/_readstat_parser.pyx":894
  *     col_names = data.col_names
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  *     max_n_obs = data.max_n_obs             # <<<<<<<<<<<<<<
@@ -9286,7 +9309,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
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   __pyx_v_max_n_obs = __pyx_t_5;
 
-  /* "pyreadstat/_readstat_parser.pyx":889
+  /* "pyreadstat/_readstat_parser.pyx":895
  *     is_unkown_number_rows = data.is_unkown_number_rows
  *     max_n_obs = data.max_n_obs
  *     metaonly = data.metaonly             # <<<<<<<<<<<<<<
@@ -9296,7 +9319,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
   __pyx_t_4 = __pyx_v_data->metaonly;
   __pyx_v_metaonly = __pyx_t_4;
 
-  /* "pyreadstat/_readstat_parser.pyx":891
+  /* "pyreadstat/_readstat_parser.pyx":897
  *     metaonly = data.metaonly
  * 
  *     for fc_cnt in range(0, len(col_names)):             # <<<<<<<<<<<<<<
@@ -9305,14 +9328,14 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
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-  __pyx_t_6 = PyList_GET_SIZE(__pyx_v_col_names); if (unlikely(__pyx_t_6 == ((Py_ssize_t)-1))) __PYX_ERR(0, 891, __pyx_L1_error)
+  __pyx_t_6 = PyList_GET_SIZE(__pyx_v_col_names); if (unlikely(__pyx_t_6 == ((Py_ssize_t)-1))) __PYX_ERR(0, 897, __pyx_L1_error)
   __pyx_t_7 = __pyx_t_6;
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     __pyx_v_fc_cnt = __pyx_t_5;
 
-    /* "pyreadstat/_readstat_parser.pyx":892
+    /* "pyreadstat/_readstat_parser.pyx":898
  * 
  *     for fc_cnt in range(0, len(col_names)):
  *         cur_name_str = col_names[fc_cnt]             # <<<<<<<<<<<<<<
@@ -9321,15 +9344,15 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
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     if (unlikely(__pyx_v_col_names == Py_None)) {
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-    __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_col_names, __pyx_v_fc_cnt, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 892, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_col_names, __pyx_v_fc_cnt, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 898, __pyx_L1_error)
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-    if (!(likely(PyString_CheckExact(__pyx_t_1))||((__pyx_t_1) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_t_1)->tp_name), 0))) __PYX_ERR(0, 892, __pyx_L1_error)
+    if (!(likely(PyString_CheckExact(__pyx_t_1))||((__pyx_t_1) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_t_1)->tp_name), 0))) __PYX_ERR(0, 898, __pyx_L1_error)
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     __pyx_t_1 = 0;
 
-    /* "pyreadstat/_readstat_parser.pyx":893
+    /* "pyreadstat/_readstat_parser.pyx":899
  *     for fc_cnt in range(0, len(col_names)):
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  *         cur_data = col_data[fc_cnt]             # <<<<<<<<<<<<<<
@@ -9338,14 +9361,14 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
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     if (unlikely(__pyx_v_col_data == Py_None)) {
       PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
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-    __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_col_data, __pyx_v_fc_cnt, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 893, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_GetItemInt_List(__pyx_v_col_data, __pyx_v_fc_cnt, int, 1, __Pyx_PyInt_From_int, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 899, __pyx_L1_error)
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     __Pyx_XDECREF_SET(__pyx_v_cur_data, __pyx_t_1);
     __pyx_t_1 = 0;
 
-    /* "pyreadstat/_readstat_parser.pyx":894
+    /* "pyreadstat/_readstat_parser.pyx":900
  *         cur_name_str = col_names[fc_cnt]
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  *         if is_unkown_number_rows and not metaonly:             # <<<<<<<<<<<<<<
@@ -9363,19 +9386,19 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
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     if (__pyx_t_4) {
 
-      /* "pyreadstat/_readstat_parser.pyx":895
+      /* "pyreadstat/_readstat_parser.pyx":901
  *         cur_data = col_data[fc_cnt]
  *         if is_unkown_number_rows and not metaonly:
  *             cur_data = cur_data[0:max_n_obs]             # <<<<<<<<<<<<<<
  *         if not metaonly:
  *             final_container[cur_name_str] = cur_data
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-      __pyx_t_1 = __Pyx_PyObject_GetSlice(__pyx_v_cur_data, 0, __pyx_v_max_n_obs, NULL, NULL, NULL, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 895, __pyx_L1_error)
+      __pyx_t_1 = __Pyx_PyObject_GetSlice(__pyx_v_cur_data, 0, __pyx_v_max_n_obs, NULL, NULL, NULL, 1, 1, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 901, __pyx_L1_error)
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       __Pyx_DECREF_SET(__pyx_v_cur_data, __pyx_t_1);
       __pyx_t_1 = 0;
 
-      /* "pyreadstat/_readstat_parser.pyx":894
+      /* "pyreadstat/_readstat_parser.pyx":900
  *         cur_name_str = col_names[fc_cnt]
  *         cur_data = col_data[fc_cnt]
  *         if is_unkown_number_rows and not metaonly:             # <<<<<<<<<<<<<<
@@ -9384,7 +9407,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
  */
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":896
+    /* "pyreadstat/_readstat_parser.pyx":902
  *         if is_unkown_number_rows and not metaonly:
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  *         if not metaonly:             # <<<<<<<<<<<<<<
@@ -9394,16 +9417,16 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
     __pyx_t_4 = ((!(__pyx_v_metaonly != 0)) != 0);
     if (__pyx_t_4) {
 
-      /* "pyreadstat/_readstat_parser.pyx":897
+      /* "pyreadstat/_readstat_parser.pyx":903
  *             cur_data = cur_data[0:max_n_obs]
  *         if not metaonly:
  *             final_container[cur_name_str] = cur_data             # <<<<<<<<<<<<<<
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  *             final_container[cur_name_str] = list()
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-      if (unlikely(PyObject_SetItem(__pyx_v_final_container, __pyx_v_cur_name_str, __pyx_v_cur_data) < 0)) __PYX_ERR(0, 897, __pyx_L1_error)
+      if (unlikely(PyObject_SetItem(__pyx_v_final_container, __pyx_v_cur_name_str, __pyx_v_cur_data) < 0)) __PYX_ERR(0, 903, __pyx_L1_error)
 
-      /* "pyreadstat/_readstat_parser.pyx":896
+      /* "pyreadstat/_readstat_parser.pyx":902
  *         if is_unkown_number_rows and not metaonly:
  *             cur_data = cur_data[0:max_n_obs]
  *         if not metaonly:             # <<<<<<<<<<<<<<
@@ -9413,7 +9436,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
       goto __pyx_L8;
     }
 
-    /* "pyreadstat/_readstat_parser.pyx":899
+    /* "pyreadstat/_readstat_parser.pyx":905
  *             final_container[cur_name_str] = cur_data
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  *             final_container[cur_name_str] = list()             # <<<<<<<<<<<<<<
@@ -9421,15 +9444,15 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
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     /*else*/ {
-      __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 899, __pyx_L1_error)
+      __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 905, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_1);
-      if (unlikely(PyObject_SetItem(__pyx_v_final_container, __pyx_v_cur_name_str, __pyx_t_1) < 0)) __PYX_ERR(0, 899, __pyx_L1_error)
+      if (unlikely(PyObject_SetItem(__pyx_v_final_container, __pyx_v_cur_name_str, __pyx_t_1) < 0)) __PYX_ERR(0, 905, __pyx_L1_error)
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     __pyx_L8:;
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-  /* "pyreadstat/_readstat_parser.pyx":901
+  /* "pyreadstat/_readstat_parser.pyx":907
  *             final_container[cur_name_str] = list()
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  *     return final_container             # <<<<<<<<<<<<<<
@@ -9441,7 +9464,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
   __pyx_r = __pyx_v_final_container;
   goto __pyx_L0;
 
-  /* "pyreadstat/_readstat_parser.pyx":870
+  /* "pyreadstat/_readstat_parser.pyx":876
  * 
  * 
  * cdef object data_container_to_dict(data_container data):             # <<<<<<<<<<<<<<
@@ -9467,7 +9490,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(
   return __pyx_r;
 }
 
-/* "pyreadstat/_readstat_parser.pyx":904
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  * 
  * cdef object dict_to_pandas_dataframe(object dict_data, data_container dc):             # <<<<<<<<<<<<<<
@@ -9500,7 +9523,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_dict_to_pandas_datafram
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-  /* "pyreadstat/_readstat_parser.pyx":915
+  /* "pyreadstat/_readstat_parser.pyx":921
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  * 
  *     dates_as_pandas = dc.dates_as_pandas             # <<<<<<<<<<<<<<
@@ -9510,29 +9533,29 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_dict_to_pandas_datafram
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   __pyx_v_dates_as_pandas = __pyx_t_1;
 
-  /* "pyreadstat/_readstat_parser.pyx":917
+  /* "pyreadstat/_readstat_parser.pyx":923
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  *     if dict_data:             # <<<<<<<<<<<<<<
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-      /* "pyreadstat/_readstat_parser.pyx":1038
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+    PyErr_SetString(PyExc_TypeError, "expected bytes, NoneType found");
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+  __pyx_v_filename = ((char *)__pyx_t_16);
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+  /* "pyreadstat/_readstat_parser.pyx":1099
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-  __Pyx_GOTREF(__pyx_t_7);
-  __pyx_v_data = ((struct __pyx_obj_10pyreadstat_16_readstat_parser_data_container *)__pyx_t_7);
-  __pyx_t_7 = 0;
+  __pyx_t_8 = __Pyx_PyObject_CallNoArg(((PyObject *)__pyx_ptype_10pyreadstat_16_readstat_parser_data_container)); if (unlikely(!__pyx_t_8)) __PYX_ERR(0, 1099, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_8);
+  __pyx_v_data = ((struct __pyx_obj_10pyreadstat_16_readstat_parser_data_container *)__pyx_t_8);
+  __pyx_t_8 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":1071
+  /* "pyreadstat/_readstat_parser.pyx":1100
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  *     data = data_container()
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@@ -11699,7 +12032,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
  */
   __pyx_v_ctx = ((void *)__pyx_v_data);
 
-  /* "pyreadstat/_readstat_parser.pyx":1073
+  /* "pyreadstat/_readstat_parser.pyx":1102
  *     ctx = <void *>data
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  *     data.file_format = file_format             # <<<<<<<<<<<<<<
@@ -11708,7 +12041,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
  */
   __pyx_v_data->file_format = __pyx_v_file_format;
 
-  /* "pyreadstat/_readstat_parser.pyx":1074
+  /* "pyreadstat/_readstat_parser.pyx":1103
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  *     data.file_format = file_format
  *     data.metaonly = metaonly             # <<<<<<<<<<<<<<
@@ -11717,7 +12050,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
  */
   __pyx_v_data->metaonly = __pyx_v_metaonly;
 
-  /* "pyreadstat/_readstat_parser.pyx":1075
+  /* "pyreadstat/_readstat_parser.pyx":1104
  *     data.file_format = file_format
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  *     data.dates_as_pandas = dates_as_pandas             # <<<<<<<<<<<<<<
@@ -11726,17 +12059,17 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
  */
   __pyx_v_data->dates_as_pandas = __pyx_v_dates_as_pandas;
 
-  /* "pyreadstat/_readstat_parser.pyx":1077
+  /* "pyreadstat/_readstat_parser.pyx":1106
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-  __pyx_t_2 = __Pyx_PyObject_IsTrue(__pyx_v_encoding); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 1077, __pyx_L1_error)
+  __pyx_t_2 = __Pyx_PyObject_IsTrue(__pyx_v_encoding); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 1106, __pyx_L1_error)
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-    /* "pyreadstat/_readstat_parser.pyx":1078
+    /* "pyreadstat/_readstat_parser.pyx":1107
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@@ -11749,7 +12082,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
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     __pyx_v_data->user_encoding = __pyx_v_encoding;
 
-    /* "pyreadstat/_readstat_parser.pyx":1077
+    /* "pyreadstat/_readstat_parser.pyx":1106
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@@ -11758,7 +12091,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
  */
   }
 
-  /* "pyreadstat/_readstat_parser.pyx":1080
+  /* "pyreadstat/_readstat_parser.pyx":1109
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  * 
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@@ -11768,7 +12101,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
   switch (__pyx_v_file_format) {
     case __pyx_e_10pyreadstat_16_readstat_parser_FILE_FORMAT_SAS:
 
-    /* "pyreadstat/_readstat_parser.pyx":1081
+    /* "pyreadstat/_readstat_parser.pyx":1110
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@@ -11778,7 +12111,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
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     __pyx_v_origin = __pyx_v_10pyreadstat_16_readstat_parser_sas_origin;
 
-    /* "pyreadstat/_readstat_parser.pyx":1080
+    /* "pyreadstat/_readstat_parser.pyx":1109
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  * 
  *     if file_format == FILE_FORMAT_SAS:             # <<<<<<<<<<<<<<
@@ -11788,7 +12121,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
     break;
     case __pyx_e_10pyreadstat_16_readstat_parser_FILE_FORMAT_SPSS:
 
-    /* "pyreadstat/_readstat_parser.pyx":1083
+    /* "pyreadstat/_readstat_parser.pyx":1112
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@@ -11798,7 +12131,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
     __Pyx_INCREF(__pyx_v_10pyreadstat_16_readstat_parser_spss_origin);
     __pyx_v_origin = __pyx_v_10pyreadstat_16_readstat_parser_spss_origin;
 
-    /* "pyreadstat/_readstat_parser.pyx":1082
+    /* "pyreadstat/_readstat_parser.pyx":1111
  *     if file_format == FILE_FORMAT_SAS:
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  *     elif file_format == FILE_FORMAT_SPSS:             # <<<<<<<<<<<<<<
@@ -11808,7 +12141,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
     break;
     case __pyx_e_10pyreadstat_16_readstat_parser_FILE_FORMAT_STATA:
 
-    /* "pyreadstat/_readstat_parser.pyx":1085
+    /* "pyreadstat/_readstat_parser.pyx":1114
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@@ -11818,7 +12151,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
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-    /* "pyreadstat/_readstat_parser.pyx":1084
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@@ -11828,37 +12161,37 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
     break;
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-    /* "pyreadstat/_readstat_parser.pyx":1087
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-    __PYX_ERR(0, 1087, __pyx_L1_error)
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-  /* "pyreadstat/_readstat_parser.pyx":1089
+  /* "pyreadstat/_readstat_parser.pyx":1118
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  *     data.origin = origin             # <<<<<<<<<<<<<<
@@ -11871,7 +12204,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
   __Pyx_DECREF(__pyx_v_data->origin);
   __pyx_v_data->origin = __pyx_v_origin;
 
-  /* "pyreadstat/_readstat_parser.pyx":1091
+  /* "pyreadstat/_readstat_parser.pyx":1120
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@@ -11882,7 +12215,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
   __pyx_t_3 = (__pyx_t_2 != 0);
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-    /* "pyreadstat/_readstat_parser.pyx":1092
+    /* "pyreadstat/_readstat_parser.pyx":1121
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  *     if usecols is not None:
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@@ -11891,7 +12224,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
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     __pyx_v_data->filter_cols = 1;
 
-    /* "pyreadstat/_readstat_parser.pyx":1093
+    /* "pyreadstat/_readstat_parser.pyx":1122
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  *         data.use_cols = usecols             # <<<<<<<<<<<<<<
@@ -11904,7 +12237,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
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-    /* "pyreadstat/_readstat_parser.pyx":1091
+    /* "pyreadstat/_readstat_parser.pyx":1120
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  *     if usecols is not None:             # <<<<<<<<<<<<<<
@@ -11913,7 +12246,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
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   }
 
-  /* "pyreadstat/_readstat_parser.pyx":1095
+  /* "pyreadstat/_readstat_parser.pyx":1124
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  *     data.usernan = usernan             # <<<<<<<<<<<<<<
@@ -11922,7 +12255,7 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
  */
   __pyx_v_data->usernan = __pyx_v_usernan;
 
-  /* "pyreadstat/_readstat_parser.pyx":1096
+  /* "pyreadstat/_readstat_parser.pyx":1125
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  *     data.usernan = usernan
  *     data.no_datetime_conversion = no_datetime_conversion             # <<<<<<<<<<<<<<
@@ -11931,39 +12264,39 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
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   __pyx_v_data->no_datetime_conversion = __pyx_v_no_datetime_conversion;
 
-  /* "pyreadstat/_readstat_parser.pyx":1099
+  /* "pyreadstat/_readstat_parser.pyx":1128
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  *     # go!
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-  __pyx_f_10pyreadstat_16_readstat_parser_run_readstat_parser(__pyx_v_filename, __pyx_v_data, __pyx_v_parse_func, __pyx_v_row_limit, __pyx_v_row_offset); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 1099, __pyx_L1_error)
+  __pyx_f_10pyreadstat_16_readstat_parser_run_readstat_parser(__pyx_v_filename, __pyx_v_data, __pyx_v_parse_func, __pyx_v_row_limit, __pyx_v_row_offset); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 1128, __pyx_L1_error)
 
-  /* "pyreadstat/_readstat_parser.pyx":1100
+  /* "pyreadstat/_readstat_parser.pyx":1129
  *     # go!
  *     run_readstat_parser(filename, data, parse_func, row_limit, row_offset)
  *     data_dict = data_container_to_dict(data)             # <<<<<<<<<<<<<<
  *     if output_format == 'dict':
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-  __pyx_t_7 = __pyx_f_10pyreadstat_16_readstat_parser_data_container_to_dict(__pyx_v_data); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 1100, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_t_7);
-  __pyx_v_data_dict = __pyx_t_7;
-  __pyx_t_7 = 0;
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+  __Pyx_GOTREF(__pyx_t_8);
+  __pyx_v_data_dict = __pyx_t_8;
+  __pyx_t_8 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":1101
+  /* "pyreadstat/_readstat_parser.pyx":1130
  *     run_readstat_parser(filename, data, parse_func, row_limit, row_offset)
  *     data_dict = data_container_to_dict(data)
  *     if output_format == 'dict':             # <<<<<<<<<<<<<<
  *         data_frame = data_dict
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-  __pyx_t_3 = (__Pyx_PyString_Equals(__pyx_v_output_format, __pyx_n_s_dict, Py_EQ)); if (unlikely(__pyx_t_3 < 0)) __PYX_ERR(0, 1101, __pyx_L1_error)
+  __pyx_t_3 = (__Pyx_PyString_Equals(__pyx_v_output_format, __pyx_n_s_dict, Py_EQ)); if (unlikely(__pyx_t_3 < 0)) __PYX_ERR(0, 1130, __pyx_L1_error)
   __pyx_t_2 = (__pyx_t_3 != 0);
   if (__pyx_t_2) {
 
-    /* "pyreadstat/_readstat_parser.pyx":1102
+    /* "pyreadstat/_readstat_parser.pyx":1131
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  *     if output_format == 'dict':
  *         data_frame = data_dict             # <<<<<<<<<<<<<<
@@ -11973,40 +12306,40 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
     __Pyx_INCREF(__pyx_v_data_dict);
     __pyx_v_data_frame = __pyx_v_data_dict;
 
-    /* "pyreadstat/_readstat_parser.pyx":1101
+    /* "pyreadstat/_readstat_parser.pyx":1130
  *     run_readstat_parser(filename, data, parse_func, row_limit, row_offset)
  *     data_dict = data_container_to_dict(data)
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  *     elif output_format == 'pandas':
  */
-    goto __pyx_L18;
+    goto __pyx_L20;
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-  /* "pyreadstat/_readstat_parser.pyx":1103
+  /* "pyreadstat/_readstat_parser.pyx":1132
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  *         data_frame = data_dict
  *     elif output_format == 'pandas':             # <<<<<<<<<<<<<<
  *         data_frame = dict_to_pandas_dataframe(data_dict, data)
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-  __pyx_t_2 = (__Pyx_PyString_Equals(__pyx_v_output_format, __pyx_n_s_pandas, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 1103, __pyx_L1_error)
+  __pyx_t_2 = (__Pyx_PyString_Equals(__pyx_v_output_format, __pyx_n_s_pandas, Py_EQ)); if (unlikely(__pyx_t_2 < 0)) __PYX_ERR(0, 1132, __pyx_L1_error)
   __pyx_t_3 = (__pyx_t_2 != 0);
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-    /* "pyreadstat/_readstat_parser.pyx":1104
+    /* "pyreadstat/_readstat_parser.pyx":1133
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  */
-    __pyx_t_7 = __pyx_f_10pyreadstat_16_readstat_parser_dict_to_pandas_dataframe(__pyx_v_data_dict, __pyx_v_data); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 1104, __pyx_L1_error)
-    __Pyx_GOTREF(__pyx_t_7);
-    __pyx_v_data_frame = __pyx_t_7;
-    __pyx_t_7 = 0;
+    __pyx_t_8 = __pyx_f_10pyreadstat_16_readstat_parser_dict_to_pandas_dataframe(__pyx_v_data_dict, __pyx_v_data); if (unlikely(!__pyx_t_8)) __PYX_ERR(0, 1133, __pyx_L1_error)
+    __Pyx_GOTREF(__pyx_t_8);
+    __pyx_v_data_frame = __pyx_t_8;
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-    /* "pyreadstat/_readstat_parser.pyx":1103
+    /* "pyreadstat/_readstat_parser.pyx":1132
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  *     elif output_format == 'pandas':             # <<<<<<<<<<<<<<
@@ -12014,46 +12347,46 @@ static PyObject *__pyx_f_10pyreadstat_16_readstat_parser_run_conversion(PyObject
  *     metadata = data_container_extract_metadata(data)
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   }
-  __pyx_L18:;
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-  /* "pyreadstat/_readstat_parser.pyx":1105
+  /* "pyreadstat/_readstat_parser.pyx":1134
  *     elif output_format == 'pandas':
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-  __pyx_t_7 = __pyx_f_10pyreadstat_16_readstat_parser_data_container_extract_metadata(__pyx_v_data); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 1105, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_t_7);
-  __pyx_v_metadata = __pyx_t_7;
-  __pyx_t_7 = 0;
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+  __Pyx_GOTREF(__pyx_t_8);
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-  /* "pyreadstat/_readstat_parser.pyx":1107
+  /* "pyreadstat/_readstat_parser.pyx":1136
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-  /* "pyreadstat/_readstat_parser.pyx":1021
+  /* "pyreadstat/_readstat_parser.pyx":1027
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- *                            bint no_datetime_conversion, long row_limit, long row_offset, str output_format):
+ *                            bint no_datetime_conversion, long row_limit, long row_offset, str output_format,
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   {&__pyx_n_s_DATE, __pyx_k_DATE, sizeof(__pyx_k_DATE), 0, 0, 1, 1},
   {&__pyx_n_s_DATE11, __pyx_k_DATE11, sizeof(__pyx_k_DATE11), 0, 0, 1, 1},
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   {&__pyx_n_s_DATE9, __pyx_k_DATE9, sizeof(__pyx_k_DATE9), 0, 0, 1, 1},
+  {&__pyx_n_s_DATEAMPM, __pyx_k_DATEAMPM, sizeof(__pyx_k_DATEAMPM), 0, 0, 1, 1},
   {&__pyx_n_s_DATETIME, __pyx_k_DATETIME, sizeof(__pyx_k_DATETIME), 0, 0, 1, 1},
   {&__pyx_n_s_DATETIME17, __pyx_k_DATETIME17, sizeof(__pyx_k_DATETIME17), 0, 0, 1, 1},
   {&__pyx_n_s_DATETIME18, __pyx_k_DATETIME18, sizeof(__pyx_k_DATETIME18), 0, 0, 1, 1},
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   {&__pyx_n_s_DATETIME22, __pyx_k_DATETIME22, sizeof(__pyx_k_DATETIME22), 0, 0, 1, 1},
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   {&__pyx_n_s_DATETIME8, __pyx_k_DATETIME8, sizeof(__pyx_k_DATETIME8), 0, 0, 1, 1},
-  {&__pyx_n_s_DAY, __pyx_k_DAY, sizeof(__pyx_k_DAY), 0, 0, 1, 1},
   {&__pyx_n_s_DDMMYY, __pyx_k_DDMMYY, sizeof(__pyx_k_DDMMYY), 0, 0, 1, 1},
   {&__pyx_n_s_DDMMYYB, __pyx_k_DDMMYYB, sizeof(__pyx_k_DDMMYYB), 0, 0, 1, 1},
   {&__pyx_n_s_DDMMYYB10, __pyx_k_DDMMYYB10, sizeof(__pyx_k_DDMMYYB10), 0, 0, 1, 1},
@@ -13454,9 +13791,12 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
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   {&__pyx_n_s_DDMMYYS10, __pyx_k_DDMMYYS10, sizeof(__pyx_k_DDMMYYS10), 0, 0, 1, 1},
-  {&__pyx_n_s_DOWNAME, __pyx_k_DOWNAME, sizeof(__pyx_k_DOWNAME), 0, 0, 1, 1},
+  {&__pyx_n_s_DTDATE, __pyx_k_DTDATE, sizeof(__pyx_k_DTDATE), 0, 0, 1, 1},
   {&__pyx_n_s_DTIME, __pyx_k_DTIME, sizeof(__pyx_k_DTIME), 0, 0, 1, 1},
   {&__pyx_n_s_DataFrame, __pyx_k_DataFrame, sizeof(__pyx_k_DataFrame), 0, 0, 1, 1},
+  {&__pyx_n_s_E8601DA, __pyx_k_E8601DA, sizeof(__pyx_k_E8601DA), 0, 0, 1, 1},
+  {&__pyx_n_s_E8601DT, __pyx_k_E8601DT, sizeof(__pyx_k_E8601DT), 0, 0, 1, 1},
+  {&__pyx_n_s_E8601TM, __pyx_k_E8601TM, sizeof(__pyx_k_E8601TM), 0, 0, 1, 1},
   {&__pyx_n_s_EDATE, __pyx_k_EDATE, sizeof(__pyx_k_EDATE), 0, 0, 1, 1},
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   {&__pyx_n_s_EDATE8, __pyx_k_EDATE8, sizeof(__pyx_k_EDATE8), 0, 0, 1, 1},
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   {&__pyx_n_s_HHMM, __pyx_k_HHMM, sizeof(__pyx_k_HHMM), 0, 0, 1, 1},
-  {&__pyx_n_s_HOUR, __pyx_k_HOUR, sizeof(__pyx_k_HOUR), 0, 0, 1, 1},
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   {&__pyx_n_s_JDATE, __pyx_k_JDATE, sizeof(__pyx_k_JDATE), 0, 0, 1, 1},
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   {&__pyx_kp_s_M8_ns, __pyx_k_M8_ns, sizeof(__pyx_k_M8_ns), 0, 0, 1, 0},
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   {&__pyx_n_s_MMDDYY, __pyx_k_MMDDYY, sizeof(__pyx_k_MMDDYY), 0, 0, 1, 1},
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   {&__pyx_n_s_OrderedDict, __pyx_k_OrderedDict, sizeof(__pyx_k_OrderedDict), 0, 0, 1, 1},
   {&__pyx_n_s_PyreadstatError, __pyx_k_PyreadstatError, sizeof(__pyx_k_PyreadstatError), 0, 0, 1, 1},
-  {&__pyx_n_s_QTR, __pyx_k_QTR, sizeof(__pyx_k_QTR), 0, 0, 1, 1},
-  {&__pyx_n_s_QTRR, __pyx_k_QTRR, sizeof(__pyx_k_QTRR), 0, 0, 1, 1},
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   {&__pyx_n_s_SDATE10, __pyx_k_SDATE10, sizeof(__pyx_k_SDATE10), 0, 0, 1, 1},
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   {&__pyx_n_s_TIME8, __pyx_k_TIME8, sizeof(__pyx_k_TIME8), 0, 0, 1, 1},
+  {&__pyx_n_s_TIMEAMPM, __pyx_k_TIMEAMPM, sizeof(__pyx_k_TIMEAMPM), 0, 0, 1, 1},
   {&__pyx_n_s_TOD, __pyx_k_TOD, sizeof(__pyx_k_TOD), 0, 0, 1, 1},
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   {&__pyx_n_s_WEEKDATX, __pyx_k_WEEKDATX, sizeof(__pyx_k_WEEKDATX), 0, 0, 1, 1},
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 static CYTHON_SMALL_CODE int __Pyx_InitCachedBuiltins(void) {
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-  /* "pyreadstat/_readstat_parser.pyx":507
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-  __pyx_tuple__4 = PyTuple_Pack(1, __pyx_int_1); if (unlikely(!__pyx_tuple__4)) __PYX_ERR(0, 507, __pyx_L1_error)
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-  /* "pyreadstat/_readstat_parser.pyx":608
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-  /* "pyreadstat/_readstat_parser.pyx":628
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  *                 dc.col_data[index] = dc.col_data[index].astype(object, copy=False)             # <<<<<<<<<<<<<<
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-  /* "pyreadstat/_readstat_parser.pyx":648
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+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_ReadstatError, __pyx_t_1) < 0) __PYX_ERR(0, 142, __pyx_L1_error)
+  __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
   __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
-  __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
+  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-  /* "pyreadstat/_readstat_parser.pyx":142
+  /* "pyreadstat/_readstat_parser.pyx":148
  *     pass
  * 
  * class PyreadstatError(Exception):             # <<<<<<<<<<<<<<
  *     """
  *     Just defining a custom exception to raise when pyreadstat raises an exception.
  */
-  __pyx_t_1 = PyTuple_New(1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 142, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_t_1);
+  __pyx_t_2 = PyTuple_New(1); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 148, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_2);
   __Pyx_INCREF(((PyObject *)(&((PyTypeObject*)PyExc_Exception)[0])));
   __Pyx_GIVEREF(((PyObject *)(&((PyTypeObject*)PyExc_Exception)[0])));
-  PyTuple_SET_ITEM(__pyx_t_1, 0, ((PyObject *)(&((PyTypeObject*)PyExc_Exception)[0])));
-  __pyx_t_3 = __Pyx_CalculateMetaclass(NULL, __pyx_t_1); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 142, __pyx_L1_error)
+  PyTuple_SET_ITEM(__pyx_t_2, 0, ((PyObject *)(&((PyTypeObject*)PyExc_Exception)[0])));
+  __pyx_t_3 = __Pyx_CalculateMetaclass(NULL, __pyx_t_2); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 148, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_3);
-  __pyx_t_4 = __Pyx_Py3MetaclassPrepare(__pyx_t_3, __pyx_t_1, __pyx_n_s_PyreadstatError, __pyx_n_s_PyreadstatError, (PyObject *) NULL, __pyx_n_s_pyreadstat__readstat_parser, __pyx_kp_s_Just_defining_a_custom_exceptio_2); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 142, __pyx_L1_error)
+  __pyx_t_4 = __Pyx_Py3MetaclassPrepare(__pyx_t_3, __pyx_t_2, __pyx_n_s_PyreadstatError, __pyx_n_s_PyreadstatError, (PyObject *) NULL, __pyx_n_s_pyreadstat__readstat_parser, __pyx_kp_s_Just_defining_a_custom_exceptio_2); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 148, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_4);
-  __pyx_t_2 = __Pyx_Py3ClassCreate(__pyx_t_3, __pyx_n_s_PyreadstatError, __pyx_t_1, __pyx_t_4, NULL, 0, 1); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 142, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_t_2);
-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_PyreadstatError, __pyx_t_2) < 0) __PYX_ERR(0, 142, __pyx_L1_error)
-  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
+  __pyx_t_1 = __Pyx_Py3ClassCreate(__pyx_t_3, __pyx_n_s_PyreadstatError, __pyx_t_2, __pyx_t_4, NULL, 0, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 148, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_1);
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_PyreadstatError, __pyx_t_1) < 0) __PYX_ERR(0, 148, __pyx_L1_error)
+  __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
   __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
-  __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
+  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
   /* "pyreadstat/_readstat_parser.pyx":1
  * # cython: c_string_type=unicode, c_string_encoding=utf8, language_level=2             # <<<<<<<<<<<<<<
  * 
  * # #############################################################################
  */
-  __pyx_t_1 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 1, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_t_1);
-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_test, __pyx_t_1) < 0) __PYX_ERR(0, 1, __pyx_L1_error)
-  __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
+  __pyx_t_2 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 1, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_2);
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_test, __pyx_t_2) < 0) __PYX_ERR(0, 1, __pyx_L1_error)
+  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
   /* "cpython/datetime.pxd":211
  * 
diff --git a/pyreadstat/_readstat_parser.pxd b/pyreadstat/_readstat_parser.pxd
index 52ff588..ceb6ea9 100644
--- a/pyreadstat/_readstat_parser.pxd
+++ b/pyreadstat/_readstat_parser.pxd
@@ -101,7 +101,8 @@ cdef object dict_to_pandas_dataframe(object final_container, data_container data
 cdef object data_container_extract_metadata(data_container data)
 cdef object run_conversion(object filename_path, py_file_format file_format, readstat_error_t parse_func(readstat_parser_t *parse, const char *, void *),
                            str encoding, bint metaonly, bint dates_as_pandas, list usecols, bint usernan,
-                           bint no_datetime_conversion, long row_limit, long row_offset, str output_format)
+                           bint no_datetime_conversion, long row_limit, long row_offset, str output_format, list extra_datetime_formats, 
+			   list extra_date_formats)
 
 # definitions for stuff about dates
 cdef list sas_date_formats 
diff --git a/pyreadstat/_readstat_parser.pyx b/pyreadstat/_readstat_parser.pyx
index 3abf9ed..cd067db 100644
--- a/pyreadstat/_readstat_parser.pyx
+++ b/pyreadstat/_readstat_parser.pyx
@@ -41,24 +41,30 @@ cdef list sas_date_formats = ["WEEKDATE", "MMDDYY", "DDMMYY", "YYMMDD", "DATE",
                                 "DDMMYYN6", "DDMMYYN8", "DDMMYYP", "DDMMYYP10", "DDMMYYS", "DDMMYYS10",
                                 "MMDDYYB", "MMDDYYB10", "MMDDYYC", "MMDDYYC10", "MMDDYYD", "MMDDYYD10",
                                 "MMDDYYN6", "MMDDYYN8", "MMDDYYP", "MMDDYYP10", "MMDDYYS", "MMDDYYS10",
-                                "MONNAME", "MONTH", "WEEKDATX", "WEEKDAY", "QTR", "QTRR", "YEAR",
-                                "YYMMDDB", "YYMMDDD", "YYMMDDN", "YYMMDDP", "YYMMDDS", "DAY", "DOWNAME"]
-cdef list sas_datetime_formats = ["DATETIME", "DATETIME18", "DATETIME19",  "DATETIME20", "DATETIME21", "DATETIME22", "TOD"]
-cdef list sas_time_formats = ["TIME", "HHMM", "TIME20.3", "TIME20", "HOUR", "TIME5"]
-cdef list sas_all_formats = sas_date_formats + sas_datetime_formats + sas_time_formats
-#sas_origin = datetime(1960,1,1)
+                                #"MONNAME", "MONTH",  "WEEKDAY", "QTR", "QTRR", "YEAR","DAY",  "DOWNAME" # these do not print as full dates in sas
+                                "WEEKDATX", "DTDATE",
+                                "IS8601DA", "E8601DA", "B8601DA",
+                                "YYMMDDB", "YYMMDDD", "YYMMDDN", "YYMMDDP", "YYMMDDS",]
+cdef list sas_datetime_formats = ["DATETIME", "DATETIME18", "DATETIME19",  "DATETIME20", "DATETIME21", "DATETIME22",
+                "E8601DT", "DATEAMPM", "MDYAMPM", "IS8601DT", "B8601DT", "B8601DN"]
+cdef list sas_time_formats = ["TIME", "HHMM", "TIME20.3", "TIME20", "TIME5", "TOD", "TIMEAMPM", "IS8601TM", "E8601TM", "B8601TM", ]
+# "HOUR" # these do not print as full time formats in sas 
+#cdef list sas_all_formats = sas_date_formats + sas_datetime_formats + sas_time_formats
+cdef list sas_all_formats
 cdef object sas_origin = datetime_new(1960, 1, 1, 0, 0, 0, 0, None)
 
 cdef list spss_datetime_formats = ["DATETIME", "DATETIME8", 'DATETIME17', 'DATETIME20', 'DATETIME23.2',"YMDHMS16","YMDHMS19","YMDHMS19.2", "YMDHMS20"]
 cdef list spss_date_formats = ["DATE",'DATE8','DATE11', 'DATE12', "ADATE","ADATE8", "ADATE10", "EDATE", 'EDATE8','EDATE10', "JDATE", "JDATE5", "JDATE7", "SDATE", "SDATE8", "SDATE10",]
 cdef list spss_time_formats = ["TIME", "DTIME", 'TIME8', 'TIME5', 'TIME11.2']
-cdef list spss_all_formats = spss_date_formats + spss_datetime_formats + spss_time_formats
+#cdef list spss_all_formats = spss_date_formats + spss_datetime_formats + spss_time_formats
+cdef list spss_all_formats
 cdef object spss_origin = datetime_new(1582, 10, 14, 0, 0, 0, 0, None)
 
 cdef list stata_datetime_formats = ["%tC", "%tc"]
 cdef list stata_date_formats = ["%td", "%d", "%tdD_m_Y", "%tdCCYY-NN-DD"]
 cdef list stata_time_formats = ["%tcHH:MM:SS", "%tcHH:MM"]
-cdef list stata_all_formats = stata_datetime_formats + stata_date_formats + stata_time_formats
+#cdef list stata_all_formats = stata_datetime_formats + stata_date_formats + stata_time_formats
+cdef list stata_all_formats
 cdef object stata_origin = datetime_new(1960, 1, 1, 0, 0, 0, 0, None)
 
 cdef dict readstat_to_numpy_types = {READSTAT_TYPE_STRING: object, READSTAT_TYPE_STRING_REF: object,
@@ -1020,7 +1026,8 @@ cdef object data_container_extract_metadata(data_container data):
 
 cdef object run_conversion(object filename_path, py_file_format file_format, readstat_error_t parse_func(readstat_parser_t *parse, const char *, void *),
                            str encoding, bint metaonly, bint dates_as_pandas, list usecols, bint usernan,
-                           bint no_datetime_conversion, long row_limit, long row_offset, str output_format):
+                           bint no_datetime_conversion, long row_limit, long row_offset, str output_format, 
+                           list extra_datetime_formats, list extra_date_formats):
     """
     Coordinates the activities to parse a file. This is the entry point 
     for the public methods
@@ -1063,7 +1070,29 @@ cdef object run_conversion(object filename_path, py_file_format file_format, rea
     allowed_formats = {'pandas', 'dict'}
     if output_format not in allowed_formats:
         raise PyreadstatError("output format must be one of {allowed_formats}, '{output_format}' was given".format(allowed_formats=allowed_formats, output_format=output_format))
-                
+
+    if extra_date_formats is not None:
+        if file_format == FILE_FORMAT_SAS:
+            sas_date_formats.extend(extra_date_formats)
+        elif file_format == FILE_FORMAT_SPSS:
+            spss_date_formats.extend(extra_date_formats)
+        elif file_format == FILE_FORMAT_STATA:
+            stata_date_formats.extend(extra_date_formats)
+        else:
+            raise PyreadstatError("Unknown file format")
+    if extra_datetime_formats is not None:
+        if file_format == FILE_FORMAT_SAS:
+            sas_datetime_formats.extend(extra_datetime_formats)
+        elif file_format == FILE_FORMAT_SPSS:
+            spss_datetime_formats.extend(extra_datetime_formats)
+        elif file_format == FILE_FORMAT_STATA:
+            stata_datetime_formats.extend(extra_datetime_formats)
+        else:
+            raise PyreadstatError("Unknown file format")
+    global sas_all_formats, spss_all_formats, stata_all_formats
+    sas_all_formats = sas_date_formats + sas_datetime_formats + sas_time_formats
+    stata_all_formats = stata_date_formats + stata_datetime_formats + stata_time_formats
+    spss_all_formats = spss_date_formats + spss_datetime_formats + spss_time_formats
 
     filename = <char *> filename_bytes
     
diff --git a/pyreadstat/_readstat_writer.c b/pyreadstat/_readstat_writer.c
index 9706cb5..9c61b72 100644
--- a/pyreadstat/_readstat_writer.c
+++ b/pyreadstat/_readstat_writer.c
@@ -989,7 +989,8 @@ enum __pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type {
   __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_OBJECT,
   __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_DATE,
   __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_DATETIME,
-  __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_TIME
+  __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_TIME,
+  __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_DATETIME64
 };
 typedef enum __pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type __pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type;
 
@@ -1492,6 +1493,14 @@ static int __Pyx__GetException(PyThreadState *tstate, PyObject **type, PyObject
 static int __Pyx_GetException(PyObject **type, PyObject **value, PyObject **tb);
 #endif
 
+/* PyFloatBinop.proto */
+#if !CYTHON_COMPILING_IN_PYPY
+static PyObject* __Pyx_PyFloat_DivideObjC(PyObject *op1, PyObject *op2, double floatval, int inplace, int zerodivision_check);
+#else
+#define __Pyx_PyFloat_DivideObjC(op1, op2, floatval, inplace, zerodivision_check)\
+    ((inplace ? __Pyx_PyNumber_InPlaceDivide(op1, op2) : __Pyx_PyNumber_Divide(op1, op2)))
+    #endif
+
 /* SwapException.proto */
 #if CYTHON_FAST_THREAD_STATE
 #define __Pyx_ExceptionSwap(type, value, tb)  __Pyx__ExceptionSwap(__pyx_tstate, type, value, tb)
@@ -1704,6 +1713,7 @@ static const char __pyx_k_sys[] = "sys";
 static const char __pyx_k_utc[] = "utc";
 static const char __pyx_k_zip[] = "zip";
 static const char __pyx_k_asm8[] = "asm8";
+static const char __pyx_k_copy[] = "copy";
 static const char __pyx_k_core[] = "core";
 static const char __pyx_k_date[] = "date";
 static const char __pyx_k_days[] = "days";
@@ -1731,6 +1741,7 @@ static const char __pyx_k_items[] = "items";
 static const char __pyx_k_numpy[] = "numpy";
 static const char __pyx_k_range[] = "range";
 static const char __pyx_k_right[] = "right";
+static const char __pyx_k_round[] = "round";
 static const char __pyx_k_scale[] = "scale";
 static const char __pyx_k_uint8[] = "uint8";
 static const char __pyx_k_union[] = "union";
@@ -1758,6 +1769,7 @@ static const char __pyx_k_asarray[] = "asarray";
 static const char __pyx_k_columns[] = "columns";
 static const char __pyx_k_combine[] = "combine";
 static const char __pyx_k_float32[] = "float32";
+static const char __pyx_k_float64[] = "float64";
 static const char __pyx_k_isalpha[] = "isalpha";
 static const char __pyx_k_nominal[] = "nominal";
 static const char __pyx_k_ordinal[] = "ordinal";
@@ -1798,9 +1810,12 @@ static const char __pyx_k_PyreadstatError[] = "PyreadstatError";
 static const char __pyx_k_readstat_parser[] = "_readstat_parser";
 static const char __pyx_k_surrogateescape[] = "surrogateescape";
 static const char __pyx_k_CategoricalDtype[] = "CategoricalDtype";
+static const char __pyx_k_pandas_api_types[] = "pandas.api.types";
 static const char __pyx_k_cline_in_traceback[] = "cline_in_traceback";
 static const char __pyx_k_unknown_file_format[] = "unknown file format";
 static const char __pyx_k_getfilesystemencoding[] = "getfilesystemencoding";
+static const char __pyx_k_is_datetime64_ns_dtype[] = "is_datetime64_ns_dtype";
+static const char __pyx_k_is_datetime64_any_dtype[] = "is_datetime64_any_dtype";
 static const char __pyx_k_Column_labels_must_be_strings[] = "Column labels must be strings";
 static const char __pyx_k_Unknown_data_format_to_insert[] = "Unknown data format to insert";
 static const char __pyx_k_first_argument_must_be_a_pandas[] = "first argument must be a pandas data frame";
@@ -1872,6 +1887,7 @@ static PyObject *__pyx_n_s_cline_in_traceback;
 static PyObject *__pyx_kp_s_column_labels_must_be_either_lis;
 static PyObject *__pyx_n_s_columns;
 static PyObject *__pyx_n_s_combine;
+static PyObject *__pyx_n_s_copy;
 static PyObject *__pyx_n_s_core;
 static PyObject *__pyx_n_s_date;
 static PyObject *__pyx_n_s_datetime;
@@ -1892,6 +1908,7 @@ static PyObject *__pyx_kp_s_file_path_could_not_be_encoded_w;
 static PyObject *__pyx_kp_s_first_argument_must_be_a_pandas;
 static PyObject *__pyx_n_s_float;
 static PyObject *__pyx_n_s_float32;
+static PyObject *__pyx_n_s_float64;
 static PyObject *__pyx_n_s_fsdecode;
 static PyObject *__pyx_n_s_fsencode;
 static PyObject *__pyx_n_s_get;
@@ -1903,6 +1920,8 @@ static PyObject *__pyx_n_s_int16;
 static PyObject *__pyx_n_s_int32;
 static PyObject *__pyx_n_s_int64;
 static PyObject *__pyx_n_s_int8;
+static PyObject *__pyx_n_s_is_datetime64_any_dtype;
+static PyObject *__pyx_n_s_is_datetime64_ns_dtype;
 static PyObject *__pyx_n_s_isalpha;
 static PyObject *__pyx_n_s_isin;
 static PyObject *__pyx_n_s_isna;
@@ -1938,6 +1957,7 @@ static PyObject *__pyx_n_s_object;
 static PyObject *__pyx_n_s_ordinal;
 static PyObject *__pyx_n_s_os;
 static PyObject *__pyx_n_s_pandas;
+static PyObject *__pyx_n_s_pandas_api_types;
 static PyObject *__pyx_n_s_path;
 static PyObject *__pyx_kp_s_path_must_be_either_str_or_bytes;
 static PyObject *__pyx_n_s_pd;
@@ -1946,6 +1966,7 @@ static PyObject *__pyx_n_s_readstat_parser;
 static PyObject *__pyx_n_s_replace;
 static PyObject *__pyx_n_s_reset_index;
 static PyObject *__pyx_n_s_right;
+static PyObject *__pyx_n_s_round;
 static PyObject *__pyx_n_s_scale;
 static PyObject *__pyx_n_s_string;
 static PyObject *__pyx_n_s_surrogateescape;
@@ -1990,6 +2011,7 @@ static __Pyx_CachedCFunction __pyx_umethod_PyDict_Type_items = {0, &__pyx_n_s_it
 static __Pyx_CachedCFunction __pyx_umethod_PyDict_Type_keys = {0, &__pyx_n_s_keys, 0, 0, 0};
 static __Pyx_CachedCFunction __pyx_umethod_PySet_Type_union = {0, &__pyx_n_s_union, 0, 0, 0};
 static __Pyx_CachedCFunction __pyx_umethod_PyString_Type_encode = {0, &__pyx_n_s_encode, 0, 0, 0};
+static PyObject *__pyx_float_1e9;
 static PyObject *__pyx_int_0;
 static PyObject *__pyx_int_1;
 static PyObject *__pyx_int_65;
@@ -2010,7 +2032,7 @@ static PyObject *__pyx_tuple__13;
 static PyObject *__pyx_tuple__14;
 /* Late includes */
 
-/* "pyreadstat/_readstat_writer.pyx":63
+/* "pyreadstat/_readstat_writer.pyx":65
  * 
  * 
  * cdef double convert_datetimelike_to_number(dst_file_format file_format, pywriter_variable_type curtype, object curval) except *:             # <<<<<<<<<<<<<<
@@ -2042,7 +2064,7 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
   __Pyx_RefNannySetupContext("convert_datetimelike_to_number", 0);
   __Pyx_INCREF(__pyx_v_curval);
 
-  /* "pyreadstat/_readstat_writer.pyx":70
+  /* "pyreadstat/_readstat_writer.pyx":72
  *     cdef double offset_days, tstamp
  * 
  *     if file_format == FILE_FORMAT_SAV or file_format == FILE_FORMAT_POR:             # <<<<<<<<<<<<<<
@@ -2053,7 +2075,7 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
     case __pyx_e_10pyreadstat_16_readstat_writer_FILE_FORMAT_SAV:
     case __pyx_e_10pyreadstat_16_readstat_writer_FILE_FORMAT_POR:
 
-    /* "pyreadstat/_readstat_writer.pyx":71
+    /* "pyreadstat/_readstat_writer.pyx":73
  * 
  *     if file_format == FILE_FORMAT_SAV or file_format == FILE_FORMAT_POR:
  *         offset_days = spss_offset_days             # <<<<<<<<<<<<<<
@@ -2062,7 +2084,7 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
  */
     __pyx_v_offset_days = __pyx_v_10pyreadstat_16_readstat_writer_spss_offset_days;
 
-    /* "pyreadstat/_readstat_writer.pyx":72
+    /* "pyreadstat/_readstat_writer.pyx":74
  *     if file_format == FILE_FORMAT_SAV or file_format == FILE_FORMAT_POR:
  *         offset_days = spss_offset_days
  *         offset_secs = spss_offset_secs             # <<<<<<<<<<<<<<
@@ -2071,7 +2093,7 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
  */
     __pyx_v_offset_secs = __pyx_v_10pyreadstat_16_readstat_writer_spss_offset_secs;
 
-    /* "pyreadstat/_readstat_writer.pyx":70
+    /* "pyreadstat/_readstat_writer.pyx":72
  *     cdef double offset_days, tstamp
  * 
  *     if file_format == FILE_FORMAT_SAV or file_format == FILE_FORMAT_POR:             # <<<<<<<<<<<<<<
@@ -2081,7 +2103,7 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
     break;
     default:
 
-    /* "pyreadstat/_readstat_writer.pyx":74
+    /* "pyreadstat/_readstat_writer.pyx":76
  *         offset_secs = spss_offset_secs
  *     else:
  *         offset_days = sas_offset_days             # <<<<<<<<<<<<<<
@@ -2090,68 +2112,69 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
  */
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-    /* "pyreadstat/_readstat_writer.pyx":75
+    /* "pyreadstat/_readstat_writer.pyx":77
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     break;
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+  /* "pyreadstat/_readstat_writer.pyx":79
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  * 
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+ *     if curtype == PYWRITER_DATETIME or curtype == PYWRITER_DATETIME64:             # <<<<<<<<<<<<<<
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-    /* "pyreadstat/_readstat_writer.pyx":79
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-      /* "pyreadstat/_readstat_writer.pyx":79
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+      /* "pyreadstat/_readstat_writer.pyx":81
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@@ -2159,52 +2182,52 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
  */
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-    /* "pyreadstat/_readstat_writer.pyx":82
+    /* "pyreadstat/_readstat_writer.pyx":84
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-        /* "pyreadstat/_readstat_writer.pyx":89
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@@ -2361,14 +2384,14 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
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-        /* "pyreadstat/_readstat_writer.pyx":88
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-        /* "pyreadstat/_readstat_writer.pyx":91
+        /* "pyreadstat/_readstat_writer.pyx":93
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@@ -2415,14 +2438,14 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
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-        /* "pyreadstat/_readstat_writer.pyx":90
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-      /* "pyreadstat/_readstat_writer.pyx":85
+      /* "pyreadstat/_readstat_writer.pyx":87
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-    /* "pyreadstat/_readstat_writer.pyx":93
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-    /* "pyreadstat/_readstat_writer.pyx":94
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@@ -2461,7 +2484,7 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
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-      /* "pyreadstat/_readstat_writer.pyx":96
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-      /* "pyreadstat/_readstat_writer.pyx":94
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-    /* "pyreadstat/_readstat_writer.pyx":99
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-    __Pyx_GetModuleGlobalName(__pyx_t_4, __pyx_n_s_datetime); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 99, __pyx_L1_error)
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-      /* "pyreadstat/_readstat_writer.pyx":101
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+      __pyx_t_4 = __Pyx_PyObject_GetAttrStr(__pyx_v_days, __pyx_n_s_days); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 103, __pyx_L1_error)
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-      /* "pyreadstat/_readstat_writer.pyx":102
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@@ -2541,7 +2564,7 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
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-      /* "pyreadstat/_readstat_writer.pyx":103
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@@ -2552,7 +2575,7 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
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         case __pyx_e_10pyreadstat_16_readstat_writer_FILE_FORMAT_POR:
 
-        /* "pyreadstat/_readstat_writer.pyx":105
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@@ -2561,7 +2584,7 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
  */
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-        /* "pyreadstat/_readstat_writer.pyx":103
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@@ -2572,7 +2595,7 @@ static double __pyx_f_10pyreadstat_16_readstat_writer_convert_datetimelike_to_nu
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-      /* "pyreadstat/_readstat_writer.pyx":99
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-    /* "pyreadstat/_readstat_writer.pyx":98
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-    /* "pyreadstat/_readstat_writer.pyx":108
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-    __Pyx_GetModuleGlobalName(__pyx_t_4, __pyx_n_s_datetime); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 108, __pyx_L1_error)
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-        /* "pyreadstat/_readstat_writer.pyx":114
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-      /* "pyreadstat/_readstat_writer.pyx":108
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+  /* "pyreadstat/_readstat_writer.pyx":118
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   __pyx_r = __pyx_v_tstamp;
   goto __pyx_L0;
 
-  /* "pyreadstat/_readstat_writer.pyx":63
+  /* "pyreadstat/_readstat_writer.pyx":65
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 }
 
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-  /* "pyreadstat/_readstat_writer.pyx":123
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-    /* "pyreadstat/_readstat_writer.pyx":124
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-      /* "pyreadstat/_readstat_writer.pyx":124
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-    /* "pyreadstat/_readstat_writer.pyx":123
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-    /* "pyreadstat/_readstat_writer.pyx":131
+    /* "pyreadstat/_readstat_writer.pyx":132
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+ *         if file_format == FILE_FORMAT_DTA:
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+ */
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+    /* "pyreadstat/_readstat_writer.pyx":133
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-      /* "pyreadstat/_readstat_writer.pyx":132
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-      /* "pyreadstat/_readstat_writer.pyx":131
+      /* "pyreadstat/_readstat_writer.pyx":133
  *             return "DATE"
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-    /* "pyreadstat/_readstat_writer.pyx":130
+    /* "pyreadstat/_readstat_writer.pyx":132
  *         else:
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     case __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_TIME:
 
-    /* "pyreadstat/_readstat_writer.pyx":138
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-    /* "pyreadstat/_readstat_writer.pyx":143
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-      /* "pyreadstat/_readstat_writer.pyx":159
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-      /* "pyreadstat/_readstat_writer.pyx":158
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-  /* "pyreadstat/_readstat_writer.pyx":160
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-    /* "pyreadstat/_readstat_writer.pyx":161
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-    __pyx_t_4 = PySequence_List(__pyx_t_1); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 161, __pyx_L1_error)
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-      /* "pyreadstat/_readstat_writer.pyx":162
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@@ -3304,7 +3336,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_get_pandas_str_series_max_len
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@@ -6188,14 +6399,14 @@ static readstat_label_set_t *__pyx_f_10pyreadstat_16_readstat_writer_set_value_l
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@@ -6228,14 +6439,14 @@ static readstat_label_set_t *__pyx_f_10pyreadstat_16_readstat_writer_set_value_l
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-      /* "pyreadstat/_readstat_writer.pyx":329
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-      /* "pyreadstat/_readstat_writer.pyx":323
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-      /* "pyreadstat/_readstat_writer.pyx":333
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@@ -6360,14 +6571,14 @@ static readstat_label_set_t *__pyx_f_10pyreadstat_16_readstat_writer_set_value_l
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-      /* "pyreadstat/_readstat_writer.pyx":354
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-        /* "pyreadstat/_readstat_writer.pyx":357
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-      /* "pyreadstat/_readstat_writer.pyx":358
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-      /* "pyreadstat/_readstat_writer.pyx":359
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@@ -6819,17 +7031,17 @@ static readstat_label_set_t *__pyx_f_10pyreadstat_16_readstat_writer_set_value_l
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@@ -6837,7 +7049,7 @@ static readstat_label_set_t *__pyx_f_10pyreadstat_16_readstat_writer_set_value_l
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@@ -7026,13 +7238,13 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-      /* "pyreadstat/_readstat_writer.pyx":377
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-        /* "pyreadstat/_readstat_writer.pyx":378
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-        /* "pyreadstat/_readstat_writer.pyx":379
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@@ -7083,14 +7295,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-        /* "pyreadstat/_readstat_writer.pyx":377
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-      /* "pyreadstat/_readstat_writer.pyx":380
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-        /* "pyreadstat/_readstat_writer.pyx":381
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-          /* "pyreadstat/_readstat_writer.pyx":382
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-          /* "pyreadstat/_readstat_writer.pyx":383
+          /* "pyreadstat/_readstat_writer.pyx":390
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-          __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 383, __pyx_L1_error)
+          __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 390, __pyx_L1_error)
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@@ -7178,14 +7390,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-          if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 383, __pyx_L1_error)
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-          /* "pyreadstat/_readstat_writer.pyx":381
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@@ -7194,29 +7406,29 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-        /* "pyreadstat/_readstat_writer.pyx":384
+        /* "pyreadstat/_readstat_writer.pyx":391
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-        __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_t_3); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 384, __pyx_L1_error)
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-          /* "pyreadstat/_readstat_writer.pyx":385
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+          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_variable_add_missing_double_value(__pyx_v_variable, __pyx_t_9)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 392, __pyx_L1_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":386
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@@ -7225,7 +7437,7 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-          /* "pyreadstat/_readstat_writer.pyx":384
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@@ -7235,7 +7447,7 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-        /* "pyreadstat/_readstat_writer.pyx":388
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@@ -7243,11 +7455,11 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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+          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_variable_add_missing_double_range(__pyx_v_variable, __pyx_t_9, __pyx_t_10)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 395, __pyx_L1_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":389
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@@ -7268,29 +7480,29 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-      /* "pyreadstat/_readstat_writer.pyx":390
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-        /* "pyreadstat/_readstat_writer.pyx":391
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@@ -7308,26 +7520,26 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-          /* "pyreadstat/_readstat_writer.pyx":392
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-          /* "pyreadstat/_readstat_writer.pyx":393
+          /* "pyreadstat/_readstat_writer.pyx":400
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+          __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 400, __pyx_L1_error)
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@@ -7341,14 +7553,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-          if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 393, __pyx_L1_error)
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-          /* "pyreadstat/_readstat_writer.pyx":391
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@@ -7357,30 +7569,30 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
  */
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-        /* "pyreadstat/_readstat_writer.pyx":394
+        /* "pyreadstat/_readstat_writer.pyx":401
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-          /* "pyreadstat/_readstat_writer.pyx":395
+          /* "pyreadstat/_readstat_writer.pyx":402
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-            /* "pyreadstat/_readstat_writer.pyx":396
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@@ -7390,14 +7602,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-            /* "pyreadstat/_readstat_writer.pyx":397
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@@ -7411,14 +7623,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-            /* "pyreadstat/_readstat_writer.pyx":395
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@@ -7427,17 +7639,17 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
  */
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-          /* "pyreadstat/_readstat_writer.pyx":398
+          /* "pyreadstat/_readstat_writer.pyx":405
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+          __pyx_t_12 = __Pyx_PyObject_AsString(__pyx_v_hi); if (unlikely((!__pyx_t_12) && PyErr_Occurred())) __PYX_ERR(0, 405, __pyx_L1_error)
+          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_variable_add_missing_string_value(__pyx_v_variable, __pyx_t_12)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 405, __pyx_L1_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":399
+          /* "pyreadstat/_readstat_writer.pyx":406
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-          /* "pyreadstat/_readstat_writer.pyx":394
+          /* "pyreadstat/_readstat_writer.pyx":401
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-        /* "pyreadstat/_readstat_writer.pyx":402
+        /* "pyreadstat/_readstat_writer.pyx":409
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@@ -7467,14 +7679,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-          /* "pyreadstat/_readstat_writer.pyx":403
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-          __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 403, __pyx_L1_error)
+          __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 410, __pyx_L1_error)
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@@ -7488,16 +7700,16 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-          if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 403, __pyx_L1_error)
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-        /* "pyreadstat/_readstat_writer.pyx":390
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-      /* "pyreadstat/_readstat_writer.pyx":405
+      /* "pyreadstat/_readstat_writer.pyx":412
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@@ -7518,14 +7730,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-        /* "pyreadstat/_readstat_writer.pyx":406
+        /* "pyreadstat/_readstat_writer.pyx":413
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-        __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 406, __pyx_L1_error)
+        __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 413, __pyx_L1_error)
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@@ -7539,16 +7751,16 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-        if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 406, __pyx_L1_error)
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-        /* "pyreadstat/_readstat_writer.pyx":409
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-          /* "pyreadstat/_readstat_writer.pyx":410
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-          /* "pyreadstat/_readstat_writer.pyx":411
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+          __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 418, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_6);
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@@ -7625,14 +7837,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-          if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 411, __pyx_L1_error)
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-          __PYX_ERR(0, 411, __pyx_L1_error)
+          __PYX_ERR(0, 418, __pyx_L1_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":409
+          /* "pyreadstat/_readstat_writer.pyx":416
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@@ -7641,17 +7853,17 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
  */
         }
 
-        /* "pyreadstat/_readstat_writer.pyx":412
+        /* "pyreadstat/_readstat_writer.pyx":419
  *                     msg = "numeric missing_ranges value given for non numeric variable %s" %variablename
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+        __pyx_t_10 = __pyx_PyFloat_AsDouble(__pyx_v_cur_range); if (unlikely((__pyx_t_10 == (double)-1) && PyErr_Occurred())) __PYX_ERR(0, 419, __pyx_L1_error)
+        __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_variable_add_missing_double_value(__pyx_v_variable, __pyx_t_10)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 419, __pyx_L1_error)
 
-        /* "pyreadstat/_readstat_writer.pyx":413
+        /* "pyreadstat/_readstat_writer.pyx":420
  *                     raise PyreadstatError(msg)
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@@ -7660,7 +7872,7 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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         __pyx_v_discrete_values = (__pyx_v_discrete_values + 1);
 
-        /* "pyreadstat/_readstat_writer.pyx":408
+        /* "pyreadstat/_readstat_writer.pyx":415
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@@ -7670,19 +7882,19 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
         goto __pyx_L19;
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-      /* "pyreadstat/_readstat_writer.pyx":414
+      /* "pyreadstat/_readstat_writer.pyx":421
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  *                 discrete_values += 1
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-      __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_t_3); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 414, __pyx_L1_error)
+      __pyx_t_3 = PyObject_RichCompare(((PyObject *)Py_TYPE(__pyx_v_cur_range)), ((PyObject *)(&PyString_Type)), Py_EQ); __Pyx_XGOTREF(__pyx_t_3); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 421, __pyx_L1_error)
+      __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_t_3); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 421, __pyx_L1_error)
       __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
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-        /* "pyreadstat/_readstat_writer.pyx":415
+        /* "pyreadstat/_readstat_writer.pyx":422
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@@ -7700,26 +7912,26 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
         }
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-          /* "pyreadstat/_readstat_writer.pyx":416
+          /* "pyreadstat/_readstat_writer.pyx":423
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-          __pyx_t_3 = __Pyx_PyString_Format(__pyx_kp_s_character_missing_ranges_value_g, __pyx_v_variablename); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 416, __pyx_L1_error)
+          __pyx_t_3 = __Pyx_PyString_Format(__pyx_kp_s_character_missing_ranges_value_g, __pyx_v_variablename); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 423, __pyx_L1_error)
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           __pyx_v_msg = __pyx_t_3;
           __pyx_t_3 = 0;
 
-          /* "pyreadstat/_readstat_writer.pyx":417
+          /* "pyreadstat/_readstat_writer.pyx":424
  *                 if vartype != PYWRITER_CHARACTER and vartype != PYWRITER_OBJECT:
  *                     msg = "character missing_ranges value given for non character variable %s" %variablename
  *                     raise PyreadstatError(msg)             # <<<<<<<<<<<<<<
  *                 if len(cur_range) > 8:
  *                         msg = "missing_ranges: string values length must not be larger than 8"
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-          __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 417, __pyx_L1_error)
+          __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 424, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_6);
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@@ -7733,14 +7945,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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           __Pyx_XDECREF(__pyx_t_7); __pyx_t_7 = 0;
-          if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 417, __pyx_L1_error)
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-          __PYX_ERR(0, 417, __pyx_L1_error)
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-          /* "pyreadstat/_readstat_writer.pyx":415
+          /* "pyreadstat/_readstat_writer.pyx":422
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@@ -7749,18 +7961,18 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
  */
         }
 
-        /* "pyreadstat/_readstat_writer.pyx":418
+        /* "pyreadstat/_readstat_writer.pyx":425
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-        __pyx_t_11 = PyObject_Length(__pyx_v_cur_range); if (unlikely(__pyx_t_11 == ((Py_ssize_t)-1))) __PYX_ERR(0, 418, __pyx_L1_error)
+        __pyx_t_11 = PyObject_Length(__pyx_v_cur_range); if (unlikely(__pyx_t_11 == ((Py_ssize_t)-1))) __PYX_ERR(0, 425, __pyx_L1_error)
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-          /* "pyreadstat/_readstat_writer.pyx":419
+          /* "pyreadstat/_readstat_writer.pyx":426
  *                     raise PyreadstatError(msg)
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@@ -7770,14 +7982,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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           __pyx_v_msg = __pyx_kp_s_missing_ranges_string_values_len;
 
-          /* "pyreadstat/_readstat_writer.pyx":420
+          /* "pyreadstat/_readstat_writer.pyx":427
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-          __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 420, __pyx_L1_error)
+          __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 427, __pyx_L1_error)
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@@ -7791,14 +8003,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
           }
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-          if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 420, __pyx_L1_error)
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           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
-          __PYX_ERR(0, 420, __pyx_L1_error)
+          __PYX_ERR(0, 427, __pyx_L1_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":418
+          /* "pyreadstat/_readstat_writer.pyx":425
  *                     msg = "character missing_ranges value given for non character variable %s" %variablename
  *                     raise PyreadstatError(msg)
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@@ -7807,17 +8019,17 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
  */
         }
 
-        /* "pyreadstat/_readstat_writer.pyx":421
+        /* "pyreadstat/_readstat_writer.pyx":428
  *                         msg = "missing_ranges: string values length must not be larger than 8"
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-        __pyx_t_12 = __Pyx_PyObject_AsString(__pyx_v_cur_range); if (unlikely((!__pyx_t_12) && PyErr_Occurred())) __PYX_ERR(0, 421, __pyx_L1_error)
-        __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_variable_add_missing_string_value(__pyx_v_variable, __pyx_t_12)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 421, __pyx_L1_error)
+        __pyx_t_12 = __Pyx_PyObject_AsString(__pyx_v_cur_range); if (unlikely((!__pyx_t_12) && PyErr_Occurred())) __PYX_ERR(0, 428, __pyx_L1_error)
+        __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_variable_add_missing_string_value(__pyx_v_variable, __pyx_t_12)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 428, __pyx_L1_error)
 
-        /* "pyreadstat/_readstat_writer.pyx":422
+        /* "pyreadstat/_readstat_writer.pyx":429
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@@ -7826,7 +8038,7 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
  */
         __pyx_v_discrete_strings = (__pyx_v_discrete_strings + 1);
 
-        /* "pyreadstat/_readstat_writer.pyx":414
+        /* "pyreadstat/_readstat_writer.pyx":421
  *                 check_exit_status(readstat_variable_add_missing_double_value(variable, cur_range))
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@@ -7836,7 +8048,7 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
         goto __pyx_L19;
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-      /* "pyreadstat/_readstat_writer.pyx":424
+      /* "pyreadstat/_readstat_writer.pyx":431
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@@ -7847,14 +8059,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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         __pyx_v_msg = __pyx_kp_s_missing_ranges_values_must_be_bo;
 
-        /* "pyreadstat/_readstat_writer.pyx":425
+        /* "pyreadstat/_readstat_writer.pyx":432
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  *         if discrete_strings > 3:
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-        __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 425, __pyx_L1_error)
+        __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 432, __pyx_L1_error)
         __Pyx_GOTREF(__pyx_t_6);
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@@ -7868,18 +8080,18 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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         __pyx_t_3 = (__pyx_t_7) ? __Pyx_PyObject_Call2Args(__pyx_t_6, __pyx_t_7, __pyx_v_msg) : __Pyx_PyObject_CallOneArg(__pyx_t_6, __pyx_v_msg);
         __Pyx_XDECREF(__pyx_t_7); __pyx_t_7 = 0;
-        if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 425, __pyx_L1_error)
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         __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
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-    /* "pyreadstat/_readstat_writer.pyx":427
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@@ -7889,7 +8101,7 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
     __pyx_t_4 = ((__pyx_v_discrete_strings > 3) != 0);
     if (unlikely(__pyx_t_4)) {
 
-      /* "pyreadstat/_readstat_writer.pyx":428
+      /* "pyreadstat/_readstat_writer.pyx":435
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  *         if discrete_strings > 3:
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@@ -7899,14 +8111,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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       __pyx_v_msg = __pyx_kp_s_missing_ranges_max_3_string_valu;
 
-      /* "pyreadstat/_readstat_writer.pyx":429
+      /* "pyreadstat/_readstat_writer.pyx":436
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  *             raise PyreadstatError(msg)             # <<<<<<<<<<<<<<
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-      __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 429, __pyx_L1_error)
+      __Pyx_GetModuleGlobalName(__pyx_t_6, __pyx_n_s_PyreadstatError); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 436, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_6);
       __pyx_t_7 = NULL;
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@@ -7920,14 +8132,14 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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       __pyx_t_3 = (__pyx_t_7) ? __Pyx_PyObject_Call2Args(__pyx_t_6, __pyx_t_7, __pyx_v_msg) : __Pyx_PyObject_CallOneArg(__pyx_t_6, __pyx_v_msg);
       __Pyx_XDECREF(__pyx_t_7); __pyx_t_7 = 0;
-      if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 429, __pyx_L1_error)
+      if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 436, __pyx_L1_error)
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       __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
       __Pyx_Raise(__pyx_t_3, 0, 0, 0);
       __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
-      __PYX_ERR(0, 429, __pyx_L1_error)
+      __PYX_ERR(0, 436, __pyx_L1_error)
 
-      /* "pyreadstat/_readstat_writer.pyx":427
+      /* "pyreadstat/_readstat_writer.pyx":434
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  *         if discrete_strings > 3:             # <<<<<<<<<<<<<<
@@ -7936,7 +8148,7 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
  */
     }
 
-    /* "pyreadstat/_readstat_writer.pyx":430
+    /* "pyreadstat/_readstat_writer.pyx":437
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@@ -7946,7 +8158,7 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
     __pyx_t_4 = (__pyx_v_range_values != 0);
     if (__pyx_t_4) {
 
-      /* "pyreadstat/_readstat_writer.pyx":431
+      /* "pyreadstat/_readstat_writer.pyx":438
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@@ -7956,7 +8168,7 @@ static void __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(PyObject
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-        /* "pyreadstat/_readstat_writer.pyx":432
+        /* "pyreadstat/_readstat_writer.pyx":439
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-        /* "pyreadstat/_readstat_writer.pyx":665
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-          /* "pyreadstat/_readstat_writer.pyx":672
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-        /* "pyreadstat/_readstat_writer.pyx":675
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-          /* "pyreadstat/_readstat_writer.pyx":676
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-          /* "pyreadstat/_readstat_writer.pyx":683
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-          /* "pyreadstat/_readstat_writer.pyx":684
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-          /* "pyreadstat/_readstat_writer.pyx":685
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-          /* "pyreadstat/_readstat_writer.pyx":689
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-              /* "pyreadstat/_readstat_writer.pyx":720
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  *                     if type(column_labels[col_indx]) != str:
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+              __pyx_t_14 = __Pyx_PyObject_GetAttrStr(__pyx_t_1, __pyx_n_s_encode); if (unlikely(!__pyx_t_14)) __PYX_ERR(0, 731, __pyx_L49_error)
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@@ -11597,14 +11814,14 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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+              if (!(likely(PyBytes_CheckExact(__pyx_t_2))||((__pyx_t_2) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "bytes", Py_TYPE(__pyx_t_2)->tp_name), 0))) __PYX_ERR(0, 731, __pyx_L49_error)
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-              /* "pyreadstat/_readstat_writer.pyx":721
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  *                         raise PyreadstatError("Column labels must be strings")
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@@ -11613,12 +11830,12 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-              __pyx_t_32 = __Pyx_PyBytes_AsString(__pyx_v_cur_col_label); if (unlikely((!__pyx_t_32) && PyErr_Occurred())) __PYX_ERR(0, 721, __pyx_L49_error)
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               readstat_variable_set_label(__pyx_v_variable, __pyx_t_32);
 
-              /* "pyreadstat/_readstat_writer.pyx":717
+              /* "pyreadstat/_readstat_writer.pyx":728
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@@ -11627,7 +11844,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-            /* "pyreadstat/_readstat_writer.pyx":716
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@@ -11636,17 +11853,17 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-          /* "pyreadstat/_readstat_writer.pyx":722
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-          __pyx_t_31 = __Pyx_PyObject_IsTrue(__pyx_v_variable_value_labels); if (unlikely(__pyx_t_31 < 0)) __PYX_ERR(0, 722, __pyx_L49_error)
+          __pyx_t_31 = __Pyx_PyObject_IsTrue(__pyx_v_variable_value_labels); if (unlikely(__pyx_t_31 < 0)) __PYX_ERR(0, 733, __pyx_L49_error)
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-            /* "pyreadstat/_readstat_writer.pyx":723
+            /* "pyreadstat/_readstat_writer.pyx":734
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-            __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_variable_value_labels, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 723, __pyx_L49_error)
+            __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_variable_value_labels, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 734, __pyx_L49_error)
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-            /* "pyreadstat/_readstat_writer.pyx":724
+            /* "pyreadstat/_readstat_writer.pyx":735
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-              /* "pyreadstat/_readstat_writer.pyx":725
+              /* "pyreadstat/_readstat_writer.pyx":736
  *                 value_labels = variable_value_labels.get(variable_name)
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  *                     labelset_name = variable_name + str(lblset_cnt)             # <<<<<<<<<<<<<<
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-              __pyx_t_2 = __Pyx_PyInt_From_int(__pyx_v_lblset_cnt); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 725, __pyx_L49_error)
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+              __pyx_t_2 = PyNumber_Add(__pyx_v_variable_name, __pyx_t_14); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 736, __pyx_L49_error)
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-              /* "pyreadstat/_readstat_writer.pyx":726
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@@ -11700,7 +11917,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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               __pyx_v_lblset_cnt = (__pyx_v_lblset_cnt + 1);
 
-              /* "pyreadstat/_readstat_writer.pyx":727
+              /* "pyreadstat/_readstat_writer.pyx":738
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@@ -11710,17 +11927,17 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
               __Pyx_INCREF(Py_None);
               __Pyx_XDECREF_SET(__pyx_v_curuser_missing, Py_None);
 
-              /* "pyreadstat/_readstat_writer.pyx":728
+              /* "pyreadstat/_readstat_writer.pyx":739
  *                     lblset_cnt += 1
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  *                     label_set = set_value_label(writer, value_labels, labelset_name,
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-              __pyx_t_31 = __Pyx_PyObject_IsTrue(__pyx_v_missing_user_values); if (unlikely(__pyx_t_31 < 0)) __PYX_ERR(0, 728, __pyx_L49_error)
+              __pyx_t_31 = __Pyx_PyObject_IsTrue(__pyx_v_missing_user_values); if (unlikely(__pyx_t_31 < 0)) __PYX_ERR(0, 739, __pyx_L49_error)
               if (__pyx_t_31) {
 
-                /* "pyreadstat/_readstat_writer.pyx":729
+                /* "pyreadstat/_readstat_writer.pyx":740
  *                     curuser_missing = None
  *                     if missing_user_values:
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@@ -11729,14 +11946,14 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-                __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_missing_user_values, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 729, __pyx_L49_error)
+                __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_missing_user_values, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 740, __pyx_L49_error)
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                 __Pyx_DECREF_SET(__pyx_v_curuser_missing, __pyx_t_2);
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-                /* "pyreadstat/_readstat_writer.pyx":728
+                /* "pyreadstat/_readstat_writer.pyx":739
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@@ -11745,40 +11962,40 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
               }
 
-              /* "pyreadstat/_readstat_writer.pyx":730
+              /* "pyreadstat/_readstat_writer.pyx":741
  *                     if missing_user_values:
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  *                     label_set = set_value_label(writer, value_labels, labelset_name,             # <<<<<<<<<<<<<<
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-              if (!(likely(PyString_CheckExact(__pyx_v_labelset_name))||((__pyx_v_labelset_name) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_labelset_name)->tp_name), 0))) __PYX_ERR(0, 730, __pyx_L49_error)
+              if (!(likely(PyString_CheckExact(__pyx_v_labelset_name))||((__pyx_v_labelset_name) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_labelset_name)->tp_name), 0))) __PYX_ERR(0, 741, __pyx_L49_error)
 
-              /* "pyreadstat/_readstat_writer.pyx":731
+              /* "pyreadstat/_readstat_writer.pyx":742
  *                         curuser_missing = missing_user_values.get(variable_name)
  *                     label_set = set_value_label(writer, value_labels, labelset_name,
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  *                     readstat_variable_set_label_set(variable, label_set)
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-              __pyx_t_2 = __Pyx_PyDict_GetItem(__pyx_v_col_names_to_types, __pyx_v_variable_name); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 731, __pyx_L49_error)
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-              __pyx_t_26 = ((__pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type)__Pyx_PyInt_As___pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type(__pyx_t_2)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 731, __pyx_L49_error)
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-              /* "pyreadstat/_readstat_writer.pyx":730
+              /* "pyreadstat/_readstat_writer.pyx":741
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-              __pyx_t_33 = __pyx_f_10pyreadstat_16_readstat_writer_set_value_label(__pyx_v_writer, __pyx_v_value_labels, ((PyObject*)__pyx_v_labelset_name), __pyx_t_26, __pyx_v_file_format, ((PyObject*)__pyx_v_variable_name), ((PyObject*)__pyx_v_curuser_missing)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 730, __pyx_L49_error)
+              __pyx_t_33 = __pyx_f_10pyreadstat_16_readstat_writer_set_value_label(__pyx_v_writer, __pyx_v_value_labels, ((PyObject*)__pyx_v_labelset_name), __pyx_t_26, __pyx_v_file_format, ((PyObject*)__pyx_v_variable_name), ((PyObject*)__pyx_v_curuser_missing)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 741, __pyx_L49_error)
               __pyx_v_label_set = __pyx_t_33;
 
-              /* "pyreadstat/_readstat_writer.pyx":732
+              /* "pyreadstat/_readstat_writer.pyx":743
  *                     label_set = set_value_label(writer, value_labels, labelset_name,
  *                         col_names_to_types[variable_name], file_format, variable_name, curuser_missing)
  *                     readstat_variable_set_label_set(variable, label_set)             # <<<<<<<<<<<<<<
@@ -11787,7 +12004,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
               readstat_variable_set_label_set(__pyx_v_variable, __pyx_v_label_set);
 
-              /* "pyreadstat/_readstat_writer.pyx":724
+              /* "pyreadstat/_readstat_writer.pyx":735
  *             if variable_value_labels:
  *                 value_labels = variable_value_labels.get(variable_name)
  *                 if value_labels:             # <<<<<<<<<<<<<<
@@ -11796,7 +12013,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
             }
 
-            /* "pyreadstat/_readstat_writer.pyx":722
+            /* "pyreadstat/_readstat_writer.pyx":733
  *                     cur_col_label = column_labels[col_indx].encode("utf-8")
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  *             if variable_value_labels:             # <<<<<<<<<<<<<<
@@ -11805,17 +12022,17 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
           }
 
-          /* "pyreadstat/_readstat_writer.pyx":733
+          /* "pyreadstat/_readstat_writer.pyx":744
  *                         col_names_to_types[variable_name], file_format, variable_name, curuser_missing)
  *                     readstat_variable_set_label_set(variable, label_set)
  *             if missing_ranges:             # <<<<<<<<<<<<<<
  *                 cur_ranges = missing_ranges.get(variable_name)
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  */
-          __pyx_t_31 = __Pyx_PyObject_IsTrue(__pyx_v_missing_ranges); if (unlikely(__pyx_t_31 < 0)) __PYX_ERR(0, 733, __pyx_L49_error)
+          __pyx_t_31 = __Pyx_PyObject_IsTrue(__pyx_v_missing_ranges); if (unlikely(__pyx_t_31 < 0)) __PYX_ERR(0, 744, __pyx_L49_error)
           if (__pyx_t_31) {
 
-            /* "pyreadstat/_readstat_writer.pyx":734
+            /* "pyreadstat/_readstat_writer.pyx":745
  *                     readstat_variable_set_label_set(variable, label_set)
  *             if missing_ranges:
  *                 cur_ranges = missing_ranges.get(variable_name)             # <<<<<<<<<<<<<<
@@ -11824,24 +12041,24 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
             if (unlikely(__pyx_v_missing_ranges == Py_None)) {
               PyErr_Format(PyExc_AttributeError, "'NoneType' object has no attribute '%.30s'", "get");
-              __PYX_ERR(0, 734, __pyx_L49_error)
+              __PYX_ERR(0, 745, __pyx_L49_error)
             }
-            __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_missing_ranges, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 734, __pyx_L49_error)
+            __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_missing_ranges, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 745, __pyx_L49_error)
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-            /* "pyreadstat/_readstat_writer.pyx":735
+            /* "pyreadstat/_readstat_writer.pyx":746
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  *                 if cur_ranges:             # <<<<<<<<<<<<<<
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-            __pyx_t_31 = __Pyx_PyObject_IsTrue(__pyx_v_cur_ranges); if (unlikely(__pyx_t_31 < 0)) __PYX_ERR(0, 735, __pyx_L49_error)
+            __pyx_t_31 = __Pyx_PyObject_IsTrue(__pyx_v_cur_ranges); if (unlikely(__pyx_t_31 < 0)) __PYX_ERR(0, 746, __pyx_L49_error)
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-              /* "pyreadstat/_readstat_writer.pyx":736
+              /* "pyreadstat/_readstat_writer.pyx":747
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@@ -11852,7 +12069,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-                /* "pyreadstat/_readstat_writer.pyx":737
+                /* "pyreadstat/_readstat_writer.pyx":748
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-                /* "pyreadstat/_readstat_writer.pyx":738
+                /* "pyreadstat/_readstat_writer.pyx":749
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@@ -11883,14 +12100,14 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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+                __PYX_ERR(0, 749, __pyx_L49_error)
 
-                /* "pyreadstat/_readstat_writer.pyx":736
+                /* "pyreadstat/_readstat_writer.pyx":747
  *                 cur_ranges = missing_ranges.get(variable_name)
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@@ -11899,18 +12116,18 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
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-              /* "pyreadstat/_readstat_writer.pyx":739
+              /* "pyreadstat/_readstat_writer.pyx":750
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-              if (!(likely(PyList_CheckExact(__pyx_v_cur_ranges))||((__pyx_v_cur_ranges) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "list", Py_TYPE(__pyx_v_cur_ranges)->tp_name), 0))) __PYX_ERR(0, 739, __pyx_L49_error)
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+              if (!(likely(PyList_CheckExact(__pyx_v_cur_ranges))||((__pyx_v_cur_ranges) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "list", Py_TYPE(__pyx_v_cur_ranges)->tp_name), 0))) __PYX_ERR(0, 750, __pyx_L49_error)
+              if (!(likely(PyString_CheckExact(__pyx_v_variable_name))||((__pyx_v_variable_name) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_variable_name)->tp_name), 0))) __PYX_ERR(0, 750, __pyx_L49_error)
+              __pyx_f_10pyreadstat_16_readstat_writer_add_missing_ranges(((PyObject*)__pyx_v_cur_ranges), __pyx_v_variable, __pyx_v_curtype, ((PyObject*)__pyx_v_variable_name)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 750, __pyx_L49_error)
 
-              /* "pyreadstat/_readstat_writer.pyx":735
+              /* "pyreadstat/_readstat_writer.pyx":746
  *             if missing_ranges:
  *                 cur_ranges = missing_ranges.get(variable_name)
  *                 if cur_ranges:             # <<<<<<<<<<<<<<
@@ -11919,7 +12136,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
             }
 
-            /* "pyreadstat/_readstat_writer.pyx":733
+            /* "pyreadstat/_readstat_writer.pyx":744
  *                         col_names_to_types[variable_name], file_format, variable_name, curuser_missing)
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@@ -11928,17 +12145,17 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
           }
 
-          /* "pyreadstat/_readstat_writer.pyx":740
+          /* "pyreadstat/_readstat_writer.pyx":751
  *                         raise PyreadstatError(msg)
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  *             if variable_alignment:             # <<<<<<<<<<<<<<
  *                 # At the moment this is ineffective for sav and dta (the function runs but in
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-          __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_variable_alignment); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 740, __pyx_L49_error)
+          __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_variable_alignment); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 751, __pyx_L49_error)
           if (__pyx_t_4) {
 
-            /* "pyreadstat/_readstat_writer.pyx":743
+            /* "pyreadstat/_readstat_writer.pyx":754
  *                 # At the moment this is ineffective for sav and dta (the function runs but in
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  *                 cur_alignment = variable_alignment.get(variable_name)             # <<<<<<<<<<<<<<
@@ -11947,35 +12164,35 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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             if (unlikely(__pyx_v_variable_alignment == Py_None)) {
               PyErr_Format(PyExc_AttributeError, "'NoneType' object has no attribute '%.30s'", "get");
-              __PYX_ERR(0, 743, __pyx_L49_error)
+              __PYX_ERR(0, 754, __pyx_L49_error)
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-            __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_variable_alignment, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 743, __pyx_L49_error)
+            __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_variable_alignment, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 754, __pyx_L49_error)
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             __Pyx_XDECREF_SET(__pyx_v_cur_alignment, __pyx_t_2);
             __pyx_t_2 = 0;
 
-            /* "pyreadstat/_readstat_writer.pyx":744
+            /* "pyreadstat/_readstat_writer.pyx":755
  *                 # the resulting file all alignments are still unknown)
  *                 cur_alignment = variable_alignment.get(variable_name)
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  *                     set_variable_alignment(variable, cur_alignment, variable_name)
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  */
-            __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_cur_alignment); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 744, __pyx_L49_error)
+            __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_cur_alignment); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 755, __pyx_L49_error)
             if (__pyx_t_4) {
 
-              /* "pyreadstat/_readstat_writer.pyx":745
+              /* "pyreadstat/_readstat_writer.pyx":756
  *                 cur_alignment = variable_alignment.get(variable_name)
  *                 if cur_alignment:
  *                     set_variable_alignment(variable, cur_alignment, variable_name)             # <<<<<<<<<<<<<<
  *             if variable_display_width:
  *                 cur_display_width = variable_display_width.get(variable_name)
  */
-              if (!(likely(PyString_CheckExact(__pyx_v_cur_alignment))||((__pyx_v_cur_alignment) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_cur_alignment)->tp_name), 0))) __PYX_ERR(0, 745, __pyx_L49_error)
-              if (!(likely(PyString_CheckExact(__pyx_v_variable_name))||((__pyx_v_variable_name) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_variable_name)->tp_name), 0))) __PYX_ERR(0, 745, __pyx_L49_error)
-              __pyx_f_10pyreadstat_16_readstat_writer_set_variable_alignment(__pyx_v_variable, ((PyObject*)__pyx_v_cur_alignment), ((PyObject*)__pyx_v_variable_name)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 745, __pyx_L49_error)
+              if (!(likely(PyString_CheckExact(__pyx_v_cur_alignment))||((__pyx_v_cur_alignment) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_cur_alignment)->tp_name), 0))) __PYX_ERR(0, 756, __pyx_L49_error)
+              if (!(likely(PyString_CheckExact(__pyx_v_variable_name))||((__pyx_v_variable_name) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_variable_name)->tp_name), 0))) __PYX_ERR(0, 756, __pyx_L49_error)
+              __pyx_f_10pyreadstat_16_readstat_writer_set_variable_alignment(__pyx_v_variable, ((PyObject*)__pyx_v_cur_alignment), ((PyObject*)__pyx_v_variable_name)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 756, __pyx_L49_error)
 
-              /* "pyreadstat/_readstat_writer.pyx":744
+              /* "pyreadstat/_readstat_writer.pyx":755
  *                 # the resulting file all alignments are still unknown)
  *                 cur_alignment = variable_alignment.get(variable_name)
  *                 if cur_alignment:             # <<<<<<<<<<<<<<
@@ -11984,7 +12201,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
             }
 
-            /* "pyreadstat/_readstat_writer.pyx":740
+            /* "pyreadstat/_readstat_writer.pyx":751
  *                         raise PyreadstatError(msg)
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  *             if variable_alignment:             # <<<<<<<<<<<<<<
@@ -11993,17 +12210,17 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
           }
 
-          /* "pyreadstat/_readstat_writer.pyx":746
+          /* "pyreadstat/_readstat_writer.pyx":757
  *                 if cur_alignment:
  *                     set_variable_alignment(variable, cur_alignment, variable_name)
  *             if variable_display_width:             # <<<<<<<<<<<<<<
  *                 cur_display_width = variable_display_width.get(variable_name)
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-          __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_variable_display_width); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 746, __pyx_L49_error)
+          __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_variable_display_width); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 757, __pyx_L49_error)
           if (__pyx_t_4) {
 
-            /* "pyreadstat/_readstat_writer.pyx":747
+            /* "pyreadstat/_readstat_writer.pyx":758
  *                     set_variable_alignment(variable, cur_alignment, variable_name)
  *             if variable_display_width:
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@@ -12012,35 +12229,35 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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             if (unlikely(__pyx_v_variable_display_width == Py_None)) {
               PyErr_Format(PyExc_AttributeError, "'NoneType' object has no attribute '%.30s'", "get");
-              __PYX_ERR(0, 747, __pyx_L49_error)
+              __PYX_ERR(0, 758, __pyx_L49_error)
             }
-            __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_variable_display_width, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 747, __pyx_L49_error)
+            __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_variable_display_width, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 758, __pyx_L49_error)
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             __pyx_t_2 = 0;
 
-            /* "pyreadstat/_readstat_writer.pyx":748
+            /* "pyreadstat/_readstat_writer.pyx":759
  *             if variable_display_width:
  *                 cur_display_width = variable_display_width.get(variable_name)
  *                 if cur_display_width:             # <<<<<<<<<<<<<<
  *                     set_variable_display_width(variable, cur_display_width, variable_name)
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  */
-            __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_cur_display_width); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 748, __pyx_L49_error)
+            __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_cur_display_width); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 759, __pyx_L49_error)
             if (__pyx_t_4) {
 
-              /* "pyreadstat/_readstat_writer.pyx":749
+              /* "pyreadstat/_readstat_writer.pyx":760
  *                 cur_display_width = variable_display_width.get(variable_name)
  *                 if cur_display_width:
  *                     set_variable_display_width(variable, cur_display_width, variable_name)             # <<<<<<<<<<<<<<
  *             if variable_measure:
  *                 cur_measure = variable_measure.get(variable_name)
  */
-              __pyx_t_27 = __Pyx_PyInt_As_int(__pyx_v_cur_display_width); if (unlikely((__pyx_t_27 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 749, __pyx_L49_error)
-              if (!(likely(PyString_CheckExact(__pyx_v_variable_name))||((__pyx_v_variable_name) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_variable_name)->tp_name), 0))) __PYX_ERR(0, 749, __pyx_L49_error)
-              __pyx_f_10pyreadstat_16_readstat_writer_set_variable_display_width(__pyx_v_variable, __pyx_t_27, ((PyObject*)__pyx_v_variable_name)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 749, __pyx_L49_error)
+              __pyx_t_27 = __Pyx_PyInt_As_int(__pyx_v_cur_display_width); if (unlikely((__pyx_t_27 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 760, __pyx_L49_error)
+              if (!(likely(PyString_CheckExact(__pyx_v_variable_name))||((__pyx_v_variable_name) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_variable_name)->tp_name), 0))) __PYX_ERR(0, 760, __pyx_L49_error)
+              __pyx_f_10pyreadstat_16_readstat_writer_set_variable_display_width(__pyx_v_variable, __pyx_t_27, ((PyObject*)__pyx_v_variable_name)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 760, __pyx_L49_error)
 
-              /* "pyreadstat/_readstat_writer.pyx":748
+              /* "pyreadstat/_readstat_writer.pyx":759
  *             if variable_display_width:
  *                 cur_display_width = variable_display_width.get(variable_name)
  *                 if cur_display_width:             # <<<<<<<<<<<<<<
@@ -12049,7 +12266,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
             }
 
-            /* "pyreadstat/_readstat_writer.pyx":746
+            /* "pyreadstat/_readstat_writer.pyx":757
  *                 if cur_alignment:
  *                     set_variable_alignment(variable, cur_alignment, variable_name)
  *             if variable_display_width:             # <<<<<<<<<<<<<<
@@ -12058,17 +12275,17 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
           }
 
-          /* "pyreadstat/_readstat_writer.pyx":750
+          /* "pyreadstat/_readstat_writer.pyx":761
  *                 if cur_display_width:
  *                     set_variable_display_width(variable, cur_display_width, variable_name)
  *             if variable_measure:             # <<<<<<<<<<<<<<
  *                 cur_measure = variable_measure.get(variable_name)
  *                 if cur_measure:
  */
-          __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_variable_measure); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 750, __pyx_L49_error)
+          __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_variable_measure); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 761, __pyx_L49_error)
           if (__pyx_t_4) {
 
-            /* "pyreadstat/_readstat_writer.pyx":751
+            /* "pyreadstat/_readstat_writer.pyx":762
  *                     set_variable_display_width(variable, cur_display_width, variable_name)
  *             if variable_measure:
  *                 cur_measure = variable_measure.get(variable_name)             # <<<<<<<<<<<<<<
@@ -12077,35 +12294,35 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
             if (unlikely(__pyx_v_variable_measure == Py_None)) {
               PyErr_Format(PyExc_AttributeError, "'NoneType' object has no attribute '%.30s'", "get");
-              __PYX_ERR(0, 751, __pyx_L49_error)
+              __PYX_ERR(0, 762, __pyx_L49_error)
             }
-            __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_variable_measure, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 751, __pyx_L49_error)
+            __pyx_t_2 = __Pyx_PyDict_GetItemDefault(__pyx_v_variable_measure, __pyx_v_variable_name, Py_None); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 762, __pyx_L49_error)
             __Pyx_GOTREF(__pyx_t_2);
             __Pyx_XDECREF_SET(__pyx_v_cur_measure, __pyx_t_2);
             __pyx_t_2 = 0;
 
-            /* "pyreadstat/_readstat_writer.pyx":752
+            /* "pyreadstat/_readstat_writer.pyx":763
  *             if variable_measure:
  *                 cur_measure = variable_measure.get(variable_name)
  *                 if cur_measure:             # <<<<<<<<<<<<<<
  *                     set_variable_measure(variable, cur_measure, variable_name)
  * 
  */
-            __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_cur_measure); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 752, __pyx_L49_error)
+            __pyx_t_4 = __Pyx_PyObject_IsTrue(__pyx_v_cur_measure); if (unlikely(__pyx_t_4 < 0)) __PYX_ERR(0, 763, __pyx_L49_error)
             if (__pyx_t_4) {
 
-              /* "pyreadstat/_readstat_writer.pyx":753
+              /* "pyreadstat/_readstat_writer.pyx":764
  *                 cur_measure = variable_measure.get(variable_name)
  *                 if cur_measure:
  *                     set_variable_measure(variable, cur_measure, variable_name)             # <<<<<<<<<<<<<<
  * 
  *         # start writing
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+              if (!(likely(PyString_CheckExact(__pyx_v_cur_measure))||((__pyx_v_cur_measure) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_cur_measure)->tp_name), 0))) __PYX_ERR(0, 764, __pyx_L49_error)
+              if (!(likely(PyString_CheckExact(__pyx_v_variable_name))||((__pyx_v_variable_name) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "str", Py_TYPE(__pyx_v_variable_name)->tp_name), 0))) __PYX_ERR(0, 764, __pyx_L49_error)
+              __pyx_f_10pyreadstat_16_readstat_writer_set_variable_measure(__pyx_v_variable, ((PyObject*)__pyx_v_cur_measure), ((PyObject*)__pyx_v_variable_name)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 764, __pyx_L49_error)
 
-              /* "pyreadstat/_readstat_writer.pyx":752
+              /* "pyreadstat/_readstat_writer.pyx":763
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@@ -12114,7 +12331,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
  */
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-            /* "pyreadstat/_readstat_writer.pyx":750
+            /* "pyreadstat/_readstat_writer.pyx":761
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-        /* "pyreadstat/_readstat_writer.pyx":756
+        /* "pyreadstat/_readstat_writer.pyx":767
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           case __pyx_e_10pyreadstat_16_readstat_writer_FILE_FORMAT_SAS7BCAT:
 
-          /* "pyreadstat/_readstat_writer.pyx":757
+          /* "pyreadstat/_readstat_writer.pyx":768
  *         # start writing
  *         if file_format == FILE_FORMAT_SAS7BCAT:
  *             check_exit_status(readstat_begin_writing_sas7bcat(writer, &fd))             # <<<<<<<<<<<<<<
  *         elif file_format == FILE_FORMAT_DTA:
  *             check_exit_status(readstat_begin_writing_dta(writer, &fd, row_count))
  */
-          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_begin_writing_sas7bcat(__pyx_v_writer, (&__pyx_v_fd))); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 757, __pyx_L49_error)
+          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_begin_writing_sas7bcat(__pyx_v_writer, (&__pyx_v_fd))); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 768, __pyx_L49_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":756
+          /* "pyreadstat/_readstat_writer.pyx":767
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  *         # start writing
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@@ -12153,16 +12370,16 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
           break;
           case __pyx_e_10pyreadstat_16_readstat_writer_FILE_FORMAT_DTA:
 
-          /* "pyreadstat/_readstat_writer.pyx":759
+          /* "pyreadstat/_readstat_writer.pyx":770
  *             check_exit_status(readstat_begin_writing_sas7bcat(writer, &fd))
  *         elif file_format == FILE_FORMAT_DTA:
  *             check_exit_status(readstat_begin_writing_dta(writer, &fd, row_count))             # <<<<<<<<<<<<<<
  *         elif file_format == FILE_FORMAT_SAV:
  *             check_exit_status(readstat_begin_writing_sav(writer, &fd, row_count))
  */
-          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_begin_writing_dta(__pyx_v_writer, (&__pyx_v_fd), __pyx_v_row_count)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 759, __pyx_L49_error)
+          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_begin_writing_dta(__pyx_v_writer, (&__pyx_v_fd), __pyx_v_row_count)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 770, __pyx_L49_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":758
+          /* "pyreadstat/_readstat_writer.pyx":769
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  *             check_exit_status(readstat_begin_writing_sas7bcat(writer, &fd))
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@@ -12172,16 +12389,16 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-          /* "pyreadstat/_readstat_writer.pyx":761
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  *             check_exit_status(readstat_begin_writing_por(writer, &fd, row_count))
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-          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_begin_writing_sav(__pyx_v_writer, (&__pyx_v_fd), __pyx_v_row_count)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 761, __pyx_L49_error)
+          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_begin_writing_sav(__pyx_v_writer, (&__pyx_v_fd), __pyx_v_row_count)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 772, __pyx_L49_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":760
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@@ -12191,16 +12408,16 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-          /* "pyreadstat/_readstat_writer.pyx":763
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+          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_begin_writing_por(__pyx_v_writer, (&__pyx_v_fd), __pyx_v_row_count)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 774, __pyx_L49_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":762
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@@ -12210,16 +12427,16 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-          /* "pyreadstat/_readstat_writer.pyx":765
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+          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_begin_writing_sas7bdat(__pyx_v_writer, (&__pyx_v_fd), __pyx_v_row_count)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 776, __pyx_L49_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":764
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-          /* "pyreadstat/_readstat_writer.pyx":767
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+          __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_begin_writing_xport(__pyx_v_writer, (&__pyx_v_fd), __pyx_v_row_count)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 778, __pyx_L49_error)
 
-          /* "pyreadstat/_readstat_writer.pyx":766
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@@ -12248,14 +12465,14 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-          /* "pyreadstat/_readstat_writer.pyx":769
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  *             check_exit_status(readstat_begin_writing_xport(writer, &fd, row_count))
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-        /* "pyreadstat/_readstat_writer.pyx":772
+        /* "pyreadstat/_readstat_writer.pyx":783
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-        __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_validate_metadata(__pyx_v_writer)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 772, __pyx_L49_error)
+        __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_validate_metadata(__pyx_v_writer)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 783, __pyx_L49_error)
 
-        /* "pyreadstat/_readstat_writer.pyx":773
+        /* "pyreadstat/_readstat_writer.pyx":784
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  *         for col_indx in range(col_count):             # <<<<<<<<<<<<<<
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-          /* "pyreadstat/_readstat_writer.pyx":774
+          /* "pyreadstat/_readstat_writer.pyx":785
  *         check_exit_status(readstat_validate_metadata(writer))
  *         for col_indx in range(col_count):
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-          /* "pyreadstat/_readstat_writer.pyx":775
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- *             tempvar = readstat_get_variable(writer, col_indx)
- *             check_exit_status(readstat_validate_variable(writer, tempvar))             # <<<<<<<<<<<<<<
+          /* "pyreadstat/_readstat_writer.pyx":786
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-          /* "pyreadstat/_readstat_writer.pyx":783
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-            __Pyx_XDECREF_SET(__pyx_v_is_missing, __pyx_t_14);
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@@ -12470,17 +13026,17 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
             __Pyx_INCREF(Py_None);
             __Pyx_XDECREF_SET(__pyx_v_curuser_missing, Py_None);
 
-            /* "pyreadstat/_readstat_writer.pyx":790
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-              /* "pyreadstat/_readstat_writer.pyx":791
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-                /* "pyreadstat/_readstat_writer.pyx":795
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-              /* "pyreadstat/_readstat_writer.pyx":793
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               __pyx_t_3 = (__pyx_t_4 != 0);
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+                __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_insert_tagged_missing_value(__pyx_v_writer, __pyx_v_tempvar, __pyx_t_13)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 832, __pyx_L49_error)
 
-                /* "pyreadstat/_readstat_writer.pyx":802
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-                /* "pyreadstat/_readstat_writer.pyx":800
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-              /* "pyreadstat/_readstat_writer.pyx":799
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+              __pyx_f_10pyreadstat_16_readstat_parser_check_exit_status(readstat_insert_double_value(__pyx_v_writer, __pyx_v_tempvar, ((double)__pyx_t_34))); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 836, __pyx_L49_error)
 
-              /* "pyreadstat/_readstat_writer.pyx":804
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  *                         continue
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  *                 if curtype == PYWRITER_DOUBLE:             # <<<<<<<<<<<<<<
  *                     check_exit_status(readstat_insert_double_value(writer, tempvar, <double>curval))
  *                 elif curtype == PYWRITER_INTEGER:
  */
-              goto __pyx_L107;
+              goto __pyx_L114;
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-            /* "pyreadstat/_readstat_writer.pyx":806
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  *                     check_exit_status(readstat_insert_double_value(writer, tempvar, <double>curval))
  *                 elif curtype == PYWRITER_INTEGER:             # <<<<<<<<<<<<<<
@@ -12703,27 +13259,27 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-              /* "pyreadstat/_readstat_writer.pyx":807
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-              /* "pyreadstat/_readstat_writer.pyx":806
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  */
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-              /* "pyreadstat/_readstat_writer.pyx":808
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-            /* "pyreadstat/_readstat_writer.pyx":810
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-              /* "pyreadstat/_readstat_writer.pyx":810
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+              goto __pyx_L114;
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-            /* "pyreadstat/_readstat_writer.pyx":812
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@@ -12811,90 +13367,120 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-              /* "pyreadstat/_readstat_writer.pyx":813
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  *                     check_exit_status(readstat_insert_string_value(writer, tempvar, curvalstr.encode("utf-8")))
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-              /* "pyreadstat/_readstat_writer.pyx":814
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  *                 elif curtype == PYWRITER_OBJECT:
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-              __pyx_t_1 = __Pyx_CallUnboundCMethod1(&__pyx_umethod_PyString_Type_encode, __pyx_v_curvalstr, __pyx_kp_s_utf_8); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 814, __pyx_L49_error)
+              __pyx_t_1 = __Pyx_CallUnboundCMethod1(&__pyx_umethod_PyString_Type_encode, __pyx_v_curvalstr, __pyx_kp_s_utf_8); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 845, __pyx_L49_error)
               __Pyx_GOTREF(__pyx_t_1);
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               __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
-              /* "pyreadstat/_readstat_writer.pyx":812
+              /* "pyreadstat/_readstat_writer.pyx":843
  *                 elif curtype == PYWRITER_CHARACTER:
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  *                     check_exit_status(readstat_insert_string_value(writer, tempvar, curvalstr.encode("utf-8")))
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-              goto __pyx_L107;
+              goto __pyx_L114;
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-            /* "pyreadstat/_readstat_writer.pyx":815
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+              /* "pyreadstat/_readstat_writer.pyx":847
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  *                     check_exit_status(readstat_insert_string_value(writer, tempvar, curvalstr.encode("utf-8")))
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+            }
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+            /* "pyreadstat/_readstat_writer.pyx":848
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  *                 elif curtype in pyrwriter_datetimelike_types:             # <<<<<<<<<<<<<<
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-              /* "pyreadstat/_readstat_writer.pyx":816
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-              /* "pyreadstat/_readstat_writer.pyx":817
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- *                     check_exit_status(readstat_insert_string_value(writer, tempvar, curvalstr.encode("utf-8")))
+              /* "pyreadstat/_readstat_writer.pyx":848
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  *                 elif curtype in pyrwriter_datetimelike_types:             # <<<<<<<<<<<<<<
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  */
-              goto __pyx_L107;
+              goto __pyx_L114;
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-            /* "pyreadstat/_readstat_writer.pyx":819
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-                  __Pyx_INCREF(__pyx_t_14);
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-        /* "pyreadstat/_readstat_writer.pyx":823
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+        /* "pyreadstat/_readstat_writer.pyx":857
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-        /* "pyreadstat/_readstat_writer.pyx":663
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@@ -12977,7 +13575,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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       __Pyx_XDECREF(__pyx_t_9); __pyx_t_9 = 0;
 
-      /* "pyreadstat/_readstat_writer.pyx":825
+      /* "pyreadstat/_readstat_writer.pyx":859
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@@ -12986,28 +13584,28 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-        __Pyx_GOTREF(__pyx_t_5);
+        __Pyx_GOTREF(__pyx_t_8);
 
-        /* "pyreadstat/_readstat_writer.pyx":826
+        /* "pyreadstat/_readstat_writer.pyx":860
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-        __Pyx_GIVEREF(__pyx_t_2);
+        __Pyx_GIVEREF(__pyx_t_14);
         __Pyx_GIVEREF(__pyx_t_1);
-        __Pyx_XGIVEREF(__pyx_t_5);
-        __Pyx_ErrRestoreWithState(__pyx_t_2, __pyx_t_1, __pyx_t_5);
-        __pyx_t_2 = 0; __pyx_t_1 = 0; __pyx_t_5 = 0; 
-        __PYX_ERR(0, 826, __pyx_L51_except_error)
+        __Pyx_XGIVEREF(__pyx_t_8);
+        __Pyx_ErrRestoreWithState(__pyx_t_14, __pyx_t_1, __pyx_t_8);
+        __pyx_t_14 = 0; __pyx_t_1 = 0; __pyx_t_8 = 0; 
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-      /* "pyreadstat/_readstat_writer.pyx":663
+      /* "pyreadstat/_readstat_writer.pyx":674
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@@ -13023,7 +13621,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
     }
   }
 
-  /* "pyreadstat/_readstat_writer.pyx":828
+  /* "pyreadstat/_readstat_writer.pyx":862
  *         raise
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@@ -13034,7 +13632,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
     /*normal exit:*/{
       readstat_writer_free(__pyx_v_writer);
 
-      /* "pyreadstat/_readstat_writer.pyx":829
+      /* "pyreadstat/_readstat_writer.pyx":863
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@@ -13068,7 +13666,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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       {
 
-        /* "pyreadstat/_readstat_writer.pyx":828
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@@ -13077,7 +13675,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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         readstat_writer_free(__pyx_v_writer);
 
-        /* "pyreadstat/_readstat_writer.pyx":829
+        /* "pyreadstat/_readstat_writer.pyx":863
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@@ -13103,7 +13701,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-  /* "pyreadstat/_readstat_writer.pyx":831
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@@ -13111,7 +13709,7 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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-  /* "pyreadstat/_readstat_writer.pyx":553
+  /* "pyreadstat/_readstat_writer.pyx":560
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@@ -13147,9 +13745,10 @@ static int __pyx_f_10pyreadstat_16_readstat_writer_run_write(PyObject *__pyx_v_d
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   __Pyx_XDECREF(__pyx_v_cur_col_label);
   __Pyx_XDECREF(__pyx_v_curvalstr);
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   __Pyx_XDECREF(__pyx_v_value_labels);
   __Pyx_XDECREF(__pyx_v_col_label_temp);
+  __Pyx_XDECREF(__pyx_v_pywriter_types);
+  __Pyx_XDECREF(__pyx_v_df2);
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   __Pyx_XDECREF(__pyx_v_table_name_bytes);
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   __Pyx_XDECREF(__pyx_v_cur_display_width);
   __Pyx_XDECREF(__pyx_v_cur_measure);
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   __Pyx_XDECREF(__pyx_v_row);
   __Pyx_XDECREF(__pyx_v_curval);
   __Pyx_XDECREF(__pyx_v_is_missing);
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   {&__pyx_n_s_combine, __pyx_k_combine, sizeof(__pyx_k_combine), 0, 0, 1, 1},
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   {&__pyx_n_s_float32, __pyx_k_float32, sizeof(__pyx_k_float32), 0, 0, 1, 1},
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   {&__pyx_n_s_int8, __pyx_k_int8, sizeof(__pyx_k_int8), 0, 0, 1, 1},
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+    __Pyx_GOTREF(__pyx_t_2);
+    __Pyx_DECREF(__pyx_t_13); __pyx_t_13 = 0;
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   __Pyx_XGOTREF(__pyx_v_10pyreadstat_16_readstat_writer_valid_user_missing_stata);
-  __Pyx_DECREF_SET(__pyx_v_10pyreadstat_16_readstat_writer_valid_user_missing_stata, __pyx_t_13);
-  __Pyx_GIVEREF(__pyx_t_13);
-  __pyx_t_13 = 0;
+  __Pyx_DECREF_SET(__pyx_v_10pyreadstat_16_readstat_writer_valid_user_missing_stata, __pyx_t_6);
+  __Pyx_GIVEREF(__pyx_t_6);
+  __pyx_t_6 = 0;
 
   /* "pyreadstat/_readstat_writer.pyx":1
  * # cython: c_string_type=unicode, c_string_encoding=utf8, language_level=2             # <<<<<<<<<<<<<<
  * # ###cython: profile=True
  * # #############################################################################
  */
-  __pyx_t_13 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_13)) __PYX_ERR(0, 1, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_t_13);
-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_test, __pyx_t_13) < 0) __PYX_ERR(0, 1, __pyx_L1_error)
-  __Pyx_DECREF(__pyx_t_13); __pyx_t_13 = 0;
+  __pyx_t_6 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 1, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_6);
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_test, __pyx_t_6) < 0) __PYX_ERR(0, 1, __pyx_L1_error)
+  __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
 
   /*--- Wrapped vars code ---*/
 
@@ -16507,8 +17138,85 @@ static int __Pyx_GetException(PyObject **type, PyObject **value, PyObject **tb)
     return -1;
 }
 
+/* PyFloatBinop */
+#if !CYTHON_COMPILING_IN_PYPY
+static PyObject* __Pyx_PyFloat_DivideObjC(PyObject *op1, PyObject *op2, double floatval, int inplace, int zerodivision_check) {
+    const double b = floatval;
+    double a, result;
+    (void)inplace;
+    (void)zerodivision_check;
+    if (likely(PyFloat_CheckExact(op1))) {
+        a = PyFloat_AS_DOUBLE(op1);
+        
+    } else
+    #if PY_MAJOR_VERSION < 3
+    if (likely(PyInt_CheckExact(op1))) {
+        a = (double) PyInt_AS_LONG(op1);
+        
+    } else
+    #endif
+    if (likely(PyLong_CheckExact(op1))) {
+        #if CYTHON_USE_PYLONG_INTERNALS
+        const digit* digits = ((PyLongObject*)op1)->ob_digit;
+        const Py_ssize_t size = Py_SIZE(op1);
+        switch (size) {
+            case  0: a = 0.0; break;
+            case -1: a = -(double) digits[0]; break;
+            case  1: a = (double) digits[0]; break;
+            case -2:
+            case 2:
+                if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT && ((8 * sizeof(unsigned long) < 53) || (1 * PyLong_SHIFT < 53))) {
+                    a = (double) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
+                    if ((8 * sizeof(unsigned long) < 53) || (2 * PyLong_SHIFT < 53) || (a < (double) ((PY_LONG_LONG)1 << 53))) {
+                        if (size == -2)
+                            a = -a;
+                        break;
+                    }
+                }
+                CYTHON_FALLTHROUGH;
+            case -3:
+            case 3:
+                if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT && ((8 * sizeof(unsigned long) < 53) || (2 * PyLong_SHIFT < 53))) {
+                    a = (double) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
+                    if ((8 * sizeof(unsigned long) < 53) || (3 * PyLong_SHIFT < 53) || (a < (double) ((PY_LONG_LONG)1 << 53))) {
+                        if (size == -3)
+                            a = -a;
+                        break;
+                    }
+                }
+                CYTHON_FALLTHROUGH;
+            case -4:
+            case 4:
+                if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT && ((8 * sizeof(unsigned long) < 53) || (3 * PyLong_SHIFT < 53))) {
+                    a = (double) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
+                    if ((8 * sizeof(unsigned long) < 53) || (4 * PyLong_SHIFT < 53) || (a < (double) ((PY_LONG_LONG)1 << 53))) {
+                        if (size == -4)
+                            a = -a;
+                        break;
+                    }
+                }
+                CYTHON_FALLTHROUGH;
+            default:
+        #else
+        {
+        #endif
+            a = PyLong_AsDouble(op1);
+            if (unlikely(a == -1.0 && PyErr_Occurred())) return NULL;
+            
+        }
+    } else {
+        return (inplace ? __Pyx_PyNumber_InPlaceDivide(op1, op2) : __Pyx_PyNumber_Divide(op1, op2));
+    }
+        
+        PyFPE_START_PROTECT("divide", return NULL)
+        result = a / b;
+        PyFPE_END_PROTECT(result)
+        return PyFloat_FromDouble(result);
+}
+#endif
+
 /* SwapException */
-#if CYTHON_FAST_THREAD_STATE
+  #if CYTHON_FAST_THREAD_STATE
 static CYTHON_INLINE void __Pyx__ExceptionSwap(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
     PyObject *tmp_type, *tmp_value, *tmp_tb;
     #if CYTHON_USE_EXC_INFO_STACK
@@ -16543,7 +17251,7 @@ static CYTHON_INLINE void __Pyx_ExceptionSwap(PyObject **type, PyObject **value,
 #endif
 
 /* TypeImport */
-#ifndef __PYX_HAVE_RT_ImportType
+  #ifndef __PYX_HAVE_RT_ImportType
 #define __PYX_HAVE_RT_ImportType
 static PyTypeObject *__Pyx_ImportType(PyObject *module, const char *module_name, const char *class_name,
     size_t size, enum __Pyx_ImportType_CheckSize check_size)
@@ -16604,7 +17312,7 @@ static PyTypeObject *__Pyx_ImportType(PyObject *module, const char *module_name,
 #endif
 
 /* Import */
-static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level) {
+  static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level) {
     PyObject *empty_list = 0;
     PyObject *module = 0;
     PyObject *global_dict = 0;
@@ -16669,7 +17377,7 @@ static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level) {
 }
 
 /* ImportFrom */
-static PyObject* __Pyx_ImportFrom(PyObject* module, PyObject* name) {
+  static PyObject* __Pyx_ImportFrom(PyObject* module, PyObject* name) {
     PyObject* value = __Pyx_PyObject_GetAttrStr(module, name);
     if (unlikely(!value) && PyErr_ExceptionMatches(PyExc_AttributeError)) {
         PyErr_Format(PyExc_ImportError,
@@ -16683,7 +17391,7 @@ static PyObject* __Pyx_ImportFrom(PyObject* module, PyObject* name) {
 }
 
 /* CLineInTraceback */
-#ifndef CYTHON_CLINE_IN_TRACEBACK
+  #ifndef CYTHON_CLINE_IN_TRACEBACK
 static int __Pyx_CLineForTraceback(CYTHON_NCP_UNUSED PyThreadState *tstate, int c_line) {
     PyObject *use_cline;
     PyObject *ptype, *pvalue, *ptraceback;
@@ -16725,7 +17433,7 @@ static int __Pyx_CLineForTraceback(CYTHON_NCP_UNUSED PyThreadState *tstate, int
 #endif
 
 /* CodeObjectCache */
-static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line) {
+  static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line) {
     int start = 0, mid = 0, end = count - 1;
     if (end >= 0 && code_line > entries[end].code_line) {
         return count;
@@ -16805,7 +17513,7 @@ static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object) {
 }
 
 /* AddTraceback */
-#include "compile.h"
+  #include "compile.h"
 #include "frameobject.h"
 #include "traceback.h"
 static PyCodeObject* __Pyx_CreateCodeObjectForTraceback(
@@ -16890,7 +17598,7 @@ static void __Pyx_AddTraceback(const char *funcname, int c_line,
 }
 
 /* CIntFromPyVerify */
-#define __PYX_VERIFY_RETURN_INT(target_type, func_type, func_value)\
+  #define __PYX_VERIFY_RETURN_INT(target_type, func_type, func_value)\
     __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 0)
 #define __PYX_VERIFY_RETURN_INT_EXC(target_type, func_type, func_value)\
     __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 1)
@@ -16912,7 +17620,7 @@ static void __Pyx_AddTraceback(const char *funcname, int c_line,
     }
 
 /* CIntToPy */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From___pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type(__pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type value) {
+  static CYTHON_INLINE PyObject* __Pyx_PyInt_From___pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type(__pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type value) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
@@ -16950,7 +17658,7 @@ static CYTHON_INLINE PyObject* __Pyx_PyInt_From___pyx_t_10pyreadstat_16_readstat
 }
 
 /* CIntToPy */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_readstat_type_t(readstat_type_t value) {
+  static CYTHON_INLINE PyObject* __Pyx_PyInt_From_readstat_type_t(readstat_type_t value) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
@@ -16988,7 +17696,7 @@ static CYTHON_INLINE PyObject* __Pyx_PyInt_From_readstat_type_t(readstat_type_t
 }
 
 /* CIntToPy */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) {
+  static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
@@ -17026,7 +17734,7 @@ static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) {
 }
 
 /* CIntToPy */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_int(int value) {
+  static CYTHON_INLINE PyObject* __Pyx_PyInt_From_int(int value) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
@@ -17064,7 +17772,7 @@ static CYTHON_INLINE PyObject* __Pyx_PyInt_From_int(int value) {
 }
 
 /* CIntFromPy */
-static CYTHON_INLINE readstat_type_t __Pyx_PyInt_As_readstat_type_t(PyObject *x) {
+  static CYTHON_INLINE readstat_type_t __Pyx_PyInt_As_readstat_type_t(PyObject *x) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
@@ -17260,7 +17968,7 @@ static CYTHON_INLINE readstat_type_t __Pyx_PyInt_As_readstat_type_t(PyObject *x)
 }
 
 /* CIntFromPy */
-static CYTHON_INLINE int32_t __Pyx_PyInt_As_int32_t(PyObject *x) {
+  static CYTHON_INLINE int32_t __Pyx_PyInt_As_int32_t(PyObject *x) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
@@ -17456,7 +18164,7 @@ static CYTHON_INLINE int32_t __Pyx_PyInt_As_int32_t(PyObject *x) {
 }
 
 /* CIntFromPy */
-static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *x) {
+  static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *x) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
@@ -17652,7 +18360,7 @@ static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *x) {
 }
 
 /* CIntFromPy */
-static CYTHON_INLINE __pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type __Pyx_PyInt_As___pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type(PyObject *x) {
+  static CYTHON_INLINE __pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type __Pyx_PyInt_As___pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type(PyObject *x) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
@@ -17848,7 +18556,7 @@ static CYTHON_INLINE __pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_t
 }
 
 /* CIntFromPy */
-static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *x) {
+  static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *x) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
@@ -18044,7 +18752,7 @@ static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *x) {
 }
 
 /* FastTypeChecks */
-#if CYTHON_COMPILING_IN_CPYTHON
+  #if CYTHON_COMPILING_IN_CPYTHON
 static int __Pyx_InBases(PyTypeObject *a, PyTypeObject *b) {
     while (a) {
         a = a->tp_base;
@@ -18144,7 +18852,7 @@ static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches2(PyObject *err, PyObj
 #endif
 
 /* CheckBinaryVersion */
-static int __Pyx_check_binary_version(void) {
+  static int __Pyx_check_binary_version(void) {
     char ctversion[4], rtversion[4];
     PyOS_snprintf(ctversion, 4, "%d.%d", PY_MAJOR_VERSION, PY_MINOR_VERSION);
     PyOS_snprintf(rtversion, 4, "%s", Py_GetVersion());
@@ -18160,7 +18868,7 @@ static int __Pyx_check_binary_version(void) {
 }
 
 /* FunctionExport */
-static int __Pyx_ExportFunction(const char *name, void (*f)(void), const char *sig) {
+  static int __Pyx_ExportFunction(const char *name, void (*f)(void), const char *sig) {
     PyObject *d = 0;
     PyObject *cobj = 0;
     union {
@@ -18197,7 +18905,7 @@ static int __Pyx_ExportFunction(const char *name, void (*f)(void), const char *s
 }
 
 /* VoidPtrImport */
-#ifndef __PYX_HAVE_RT_ImportVoidPtr
+  #ifndef __PYX_HAVE_RT_ImportVoidPtr
 #define __PYX_HAVE_RT_ImportVoidPtr
 static int __Pyx_ImportVoidPtr(PyObject *module, const char *name, void **p, const char *sig) {
     PyObject *d = 0;
@@ -18246,7 +18954,7 @@ static int __Pyx_ImportVoidPtr(PyObject *module, const char *name, void **p, con
 #endif
 
 /* FunctionImport */
-#ifndef __PYX_HAVE_RT_ImportFunction
+  #ifndef __PYX_HAVE_RT_ImportFunction
 #define __PYX_HAVE_RT_ImportFunction
 static int __Pyx_ImportFunction(PyObject *module, const char *funcname, void (**f)(void), const char *sig) {
     PyObject *d = 0;
@@ -18300,7 +19008,7 @@ static int __Pyx_ImportFunction(PyObject *module, const char *funcname, void (**
 #endif
 
 /* InitStrings */
-static int __Pyx_InitStrings(__Pyx_StringTabEntry *t) {
+  static int __Pyx_InitStrings(__Pyx_StringTabEntry *t) {
     while (t->p) {
         #if PY_MAJOR_VERSION < 3
         if (t->is_unicode) {
diff --git a/pyreadstat/_readstat_writer.pxd b/pyreadstat/_readstat_writer.pxd
index 75fb34c..cc1910c 100644
--- a/pyreadstat/_readstat_writer.pxd
+++ b/pyreadstat/_readstat_writer.pxd
@@ -72,6 +72,7 @@ ctypedef enum pywriter_variable_type:
     PYWRITER_DATE
     PYWRITER_DATETIME
     PYWRITER_TIME
+    PYWRITER_DATETIME64
 
 cdef double convert_datetimelike_to_number(dst_file_format file_format, pywriter_variable_type curtype, object curval) except *
 cdef char * get_datetimelike_format_for_readstat(dst_file_format file_format, pywriter_variable_type curtype)
diff --git a/pyreadstat/_readstat_writer.pyx b/pyreadstat/_readstat_writer.pyx
index 28575ee..3fda751 100644
--- a/pyreadstat/_readstat_writer.pyx
+++ b/pyreadstat/_readstat_writer.pyx
@@ -22,6 +22,7 @@ import sys
 import numpy as np
 #cimport numpy as np
 import pandas as pd
+from pandas.api.types import is_datetime64_any_dtype, is_datetime64_ns_dtype
 import datetime
 import calendar
 IF PY_MAJOR_VERSION >2:
@@ -41,14 +42,15 @@ cdef set float_types = {float, np.dtype('int64'), np.dtype('uint64'), np.dtype('
                np.dtype('float32'), np.int64, np.uint64, np.uint32, pd.Int64Dtype(), pd.UInt32Dtype(), pd.UInt64Dtype(),
                pd.Float64Dtype(), pd.Float32Dtype()}
 cdef set numeric_types = int_types.union(float_types).union(int_mixed_types)
-cdef set datetime_types = {datetime.datetime, np.datetime64, pd._libs.tslibs.timestamps.Timestamp}
+cdef set datetime_types = {datetime.datetime}#, np.datetime64, pd._libs.tslibs.timestamps.Timestamp, pd.DatetimeTZDtype, 'datetime64[ns, UTC]'}
 cdef set nat_types = {datetime.datetime, np.datetime64, pd._libs.tslibs.timestamps.Timestamp, datetime.time, datetime.date}
-cdef set pyrwriter_datetimelike_types = {PYWRITER_DATE, PYWRITER_DATETIME, PYWRITER_TIME}
+cdef set pyrwriter_datetimelike_types = {PYWRITER_DATE, PYWRITER_DATETIME, PYWRITER_TIME, PYWRITER_DATETIME64}
 cdef set pywriter_numeric_types = {PYWRITER_DOUBLE, PYWRITER_INTEGER, PYWRITER_LOGICAL, PYWRITER_DATE, PYWRITER_DATETIME, PYWRITER_TIME}
 cdef dict pandas_to_readstat_types = {PYWRITER_DOUBLE: READSTAT_TYPE_DOUBLE, PYWRITER_INTEGER: READSTAT_TYPE_INT32,
                                       PYWRITER_CHARACTER: READSTAT_TYPE_STRING, PYWRITER_LOGICAL: READSTAT_TYPE_INT32,
                                       PYWRITER_OBJECT: READSTAT_TYPE_STRING, PYWRITER_DATE: READSTAT_TYPE_DOUBLE,
-                                      PYWRITER_DATETIME: READSTAT_TYPE_DOUBLE, PYWRITER_TIME: READSTAT_TYPE_DOUBLE}
+                                      PYWRITER_DATETIME: READSTAT_TYPE_DOUBLE, PYWRITER_TIME: READSTAT_TYPE_DOUBLE,
+                                      PYWRITER_DATETIME64: READSTAT_TYPE_DOUBLE}
 
 cdef double spss_offset_secs = 12219379200
 cdef double sas_offset_secs = 315619200
@@ -74,7 +76,7 @@ cdef double convert_datetimelike_to_number(dst_file_format file_format, pywriter
         offset_days = sas_offset_days
         offset_secs = sas_offset_secs
 
-    if curtype == PYWRITER_DATETIME:
+    if curtype == PYWRITER_DATETIME or curtype == PYWRITER_DATETIME64:
         # get timestamp in seconds
         if type(curval) == pd._libs.tslibs.timestamps.Timestamp:
             curval = curval.asm8
@@ -127,7 +129,7 @@ cdef char * get_datetimelike_format_for_readstat(dst_file_format file_format, py
         #    return "DATE11"
         else:
             return "DATE"
-    elif curtype == PYWRITER_DATETIME:
+    elif curtype == PYWRITER_DATETIME or curtype == PYWRITER_DATETIME64:
         if file_format == FILE_FORMAT_DTA:
             return "%tc"
         #elif file_format == FILE_FORMAT_SAV:
@@ -218,7 +220,12 @@ cdef list get_pandas_column_types(object df, dict missing_user_values, dict vari
         elif col_type == bool:
             result.append((PYWRITER_LOGICAL, 0,0))
         # np.datetime64[ns]
-        elif col_type == np.dtype('<M8[ns]') or col_type in datetime_types:
+        elif is_datetime64_ns_dtype(df[col_name]):
+            if np.any(pd.isna(curseries)):
+                result.append((PYWRITER_DATETIME64, 0,1))
+            else:
+                result.append((PYWRITER_DATETIME64, 0,0))
+        elif col_type == np.dtype('<M8[ns]') or col_type in datetime_types or is_datetime64_any_dtype(df[col_name]):
             if np.any(pd.isna(curseries)):
                 result.append((PYWRITER_DATETIME, 0,1))
             else:
@@ -351,7 +358,7 @@ cdef readstat_label_set_t *set_value_label(readstat_writer_t *writer, dict value
             value = str(value)
             readstat_label_string_value(label_set, value.encode("utf-8"), label.encode("utf-8"))
 
-        elif curpytype in (PYWRITER_DATE, PYWRITER_DATETIME, PYWRITER_TIME):
+        elif curpytype in (PYWRITER_DATE, PYWRITER_DATETIME, PYWRITER_TIME, PYWRITER_DATETIME64):
             if type(value) not in nat_types:
                 msg = "variable_value_labels: type of Value %s in variable %s must match the type of the column in pandas and be of type date, datetime or time" % (str(value), variable_name)
                 raise PyreadstatError(msg)
@@ -636,6 +643,10 @@ cdef int run_write(df, object filename_path, dst_file_format file_format, str fi
     cdef int lblset_cnt = 0
     cdef readstat_label_set_t *label_set
     cdef list col_label_temp 
+    cdef bint hasdatetime64
+    cdef list pywriter_types
+    cdef object df2
+    cdef float mulfac
 
     if hasattr(os, 'fsencode'):
         try:
@@ -774,17 +785,37 @@ cdef int run_write(df, object filename_path, dst_file_format file_format, str fi
             tempvar = readstat_get_variable(writer, col_indx)
             check_exit_status(readstat_validate_variable(writer, tempvar))
 
+        # vectorized transform of datetime64ns columns
+        pywriter_types = [x[0] for x in col_types]
+        hasdatetime64 = PYWRITER_DATETIME64 in pywriter_types
+        if hasdatetime64:
+            df2 = df.copy()
+            for col_indx in range(col_count):
+                if pywriter_types[col_indx] == PYWRITER_DATETIME64:
+                    if file_format == FILE_FORMAT_SAV or file_format == FILE_FORMAT_POR:
+                        offset_secs = spss_offset_secs
+                    else:
+                        offset_secs = sas_offset_secs
+                    mulfac = 1.0
+                    if file_format == FILE_FORMAT_DTA:
+                        # stata stores in milliseconds
+                        mulfac = 1000.0
+                    df2.iloc[:, col_indx] = (np.round(df2.iloc[:, col_indx].values.astype(object).astype(np.float64)/1e9) + offset_secs) * mulfac
+        else:
+            df2 = df
+
         # inserting
-        values = df.values
+        rowcnt = 0
 
-        for  row in values:
+        for  row in df2.values:
             check_exit_status(readstat_begin_row(writer))
 
             for col_indx in range(col_count):
 
                 tempvar = readstat_get_variable(writer, col_indx)
                 curval = row[col_indx]
-                curtype = col_types[col_indx][0]
+                #curtype = col_types[col_indx][0]
+                curtype = pywriter_types[col_indx]
                 is_missing = col_types[col_indx][2]
                 curuser_missing = None
                 if missing_user_values:
@@ -812,6 +843,8 @@ cdef int run_write(df, object filename_path, dst_file_format file_format, str fi
                 elif curtype == PYWRITER_OBJECT:
                     curvalstr = str(curval)
                     check_exit_status(readstat_insert_string_value(writer, tempvar, curvalstr.encode("utf-8")))
+                elif curtype == PYWRITER_DATETIME64:
+                    check_exit_status(readstat_insert_double_value(writer, tempvar, <double>curval))
                 elif curtype in pyrwriter_datetimelike_types:
                     dtimelikeval = convert_datetimelike_to_number(file_format, curtype, curval)
                     check_exit_status(readstat_insert_double_value(writer, tempvar, dtimelikeval))
@@ -819,6 +852,7 @@ cdef int run_write(df, object filename_path, dst_file_format file_format, str fi
                     raise PyreadstatError("Unknown data format to insert")
 
             check_exit_status(readstat_end_row(writer))
+            rowcnt += 1
 
         check_exit_status(readstat_end_writing(writer))
 
diff --git a/pyreadstat/pyreadstat.c b/pyreadstat/pyreadstat.c
index b6dd8a3..e9c4abb 100644
--- a/pyreadstat/pyreadstat.c
+++ b/pyreadstat/pyreadstat.c
@@ -990,7 +990,8 @@ enum __pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type {
   __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_OBJECT,
   __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_DATE,
   __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_DATETIME,
-  __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_TIME
+  __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_TIME,
+  __pyx_e_10pyreadstat_16_readstat_writer_PYWRITER_DATETIME64
 };
 typedef enum __pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type __pyx_t_10pyreadstat_16_readstat_writer_pywriter_variable_type;
 
@@ -1041,7 +1042,7 @@ struct __pyx_obj_10pyreadstat_16_readstat_parser_data_container {
 };
 
 
-/* "pyreadstat/pyreadstat.pyx":507
+/* "pyreadstat/pyreadstat.pyx":534
  * 
  * 
  * def set_value_labels(dataframe, metadata, formats_as_category=True, formats_as_ordered_category=False):             # <<<<<<<<<<<<<<
@@ -1054,7 +1055,7 @@ struct __pyx_obj_10pyreadstat_10pyreadstat___pyx_scope_struct__set_value_labels
 };
 
 
-/* "pyreadstat/pyreadstat.pyx":615
+/* "pyreadstat/pyreadstat.pyx":642
  * # convenience functions to read in chunks
  * 
  * def read_file_in_chunks(read_function, file_path, chunksize=100000, offset=0, limit=0,             # <<<<<<<<<<<<<<
@@ -1827,7 +1828,7 @@ static PyObject **__pyx_vp_10pyreadstat_16_readstat_parser_stata_all_formats = 0
 #define __pyx_v_10pyreadstat_16_readstat_parser_stata_all_formats (*__pyx_vp_10pyreadstat_16_readstat_parser_stata_all_formats)
 static PyObject **__pyx_vp_10pyreadstat_16_readstat_parser_stata_origin = 0;
 #define __pyx_v_10pyreadstat_16_readstat_parser_stata_origin (*__pyx_vp_10pyreadstat_16_readstat_parser_stata_origin)
-static PyObject *(*__pyx_f_10pyreadstat_16_readstat_parser_run_conversion)(PyObject *, __pyx_t_10pyreadstat_16_readstat_parser_py_file_format, readstat_error_t (readstat_parser_t *, char const *, void *), PyObject *, int, int, PyObject *, int, int, long, long, PyObject *); /*proto*/
+static PyObject *(*__pyx_f_10pyreadstat_16_readstat_parser_run_conversion)(PyObject *, __pyx_t_10pyreadstat_16_readstat_parser_py_file_format, readstat_error_t (readstat_parser_t *, char const *, void *), PyObject *, int, int, PyObject *, int, int, long, long, PyObject *, PyObject *, PyObject *); /*proto*/
 
 /* Module declarations from 'pyreadstat._readstat_writer' */
 static int (*__pyx_f_10pyreadstat_16_readstat_writer_run_write)(PyObject *, PyObject *, __pyx_t_10pyreadstat_16_readstat_writer_dst_file_format, PyObject *, PyObject *, int, PyObject *, PyObject *, PyObject *, PyObject *, PyObject *, PyObject *, PyObject *, PyObject *, PyObject *, int); /*proto*/
@@ -1980,6 +1981,7 @@ static const char __pyx_k_set_value_labels[] = "set_value_labels";
 static const char __pyx_k_variable_measure[] = "variable_measure";
 static const char __pyx_k_variable_to_label[] = "variable_to_label";
 static const char __pyx_k_cline_in_traceback[] = "cline_in_traceback";
+static const char __pyx_k_extra_date_formats[] = "extra_date_formats";
 static const char __pyx_k_restricted_integer[] = "restricted_integer";
 static const char __pyx_k_set_catalog_to_sas[] = "set_catalog_to_sas";
 static const char __pyx_k_variable_alignment[] = "variable_alignment";
@@ -1992,6 +1994,7 @@ static const char __pyx_k_Version_not_supported[] = "Version not supported";
 static const char __pyx_k_catalog_metadata_copy[] = "catalog_metadata_copy";
 static const char __pyx_k_pyreadstat_pyreadstat[] = "pyreadstat.pyreadstat";
 static const char __pyx_k_variable_value_labels[] = "variable_value_labels";
+static const char __pyx_k_extra_datetime_formats[] = "extra_datetime_formats";
 static const char __pyx_k_no_datetime_conversion[] = "no_datetime_conversion";
 static const char __pyx_k_variable_display_width[] = "variable_display_width";
 static const char __pyx_k_dates_as_pandas_datetime[] = "dates_as_pandas_datetime";
@@ -2053,6 +2056,8 @@ static PyObject *__pyx_n_s_dst_path;
 static PyObject *__pyx_n_s_dta;
 static PyObject *__pyx_n_s_encoding;
 static PyObject *__pyx_n_s_enumerate;
+static PyObject *__pyx_n_s_extra_date_formats;
+static PyObject *__pyx_n_s_extra_datetime_formats;
 static PyObject *__pyx_n_s_file_format;
 static PyObject *__pyx_n_s_file_format_version;
 static PyObject *__pyx_n_s_file_label;
@@ -2165,11 +2170,11 @@ static PyObject *__pyx_n_s_write_sav;
 static PyObject *__pyx_n_s_write_xport;
 static PyObject *__pyx_n_s_x;
 static PyObject *__pyx_n_s_xport;
-static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_catalog_file, PyObject *__pyx_v_formats_as_category, PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_user_missing, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format); /* proto */
-static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format); /* proto */
-static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_4read_dta(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_apply_value_formats, PyObject *__pyx_v_formats_as_category, PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_user_missing, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format); /* proto */
-static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_apply_value_formats, PyObject *__pyx_v_formats_as_category, PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_user_missing, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format); /* proto */
-static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_8read_por(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_apply_value_formats, PyObject *__pyx_v_formats_as_category, CYTHON_UNUSED PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format); /* proto */
+static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_catalog_file, PyObject *__pyx_v_formats_as_category, PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_user_missing, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format, PyObject *__pyx_v_extra_datetime_formats, PyObject *__pyx_v_extra_date_formats); /* proto */
+static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format, PyObject *__pyx_v_extra_datetime_formats, PyObject *__pyx_v_extra_date_formats); /* proto */
+static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_4read_dta(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_apply_value_formats, PyObject *__pyx_v_formats_as_category, PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_user_missing, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format, PyObject *__pyx_v_extra_datetime_formats, PyObject *__pyx_v_extra_date_formats); /* proto */
+static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_apply_value_formats, PyObject *__pyx_v_formats_as_category, PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_user_missing, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format, PyObject *__pyx_v_extra_datetime_formats, PyObject *__pyx_v_extra_date_formats); /* proto */
+static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_8read_por(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_apply_value_formats, PyObject *__pyx_v_formats_as_category, CYTHON_UNUSED PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format, PyObject *__pyx_v_extra_datetime_formats, PyObject *__pyx_v_extra_date_formats); /* proto */
 static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_10read_sas7bcat(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_encoding, PyObject *__pyx_v_output_format); /* proto */
 static PyObject *__pyx_lambda_funcdef_lambda(PyObject *__pyx_self, PyObject *__pyx_v_x); /* proto */
 static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_12set_value_labels(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_dataframe, PyObject *__pyx_v_metadata, PyObject *__pyx_v_formats_as_category, PyObject *__pyx_v_formats_as_ordered_category); /* proto */
@@ -2229,12 +2234,12 @@ static PyObject *__pyx_codeobj__34;
  * 
  * def read_sas7bdat(filename_path, metadataonly=False, dates_as_pandas_datetime=False, catalog_file=None,             # <<<<<<<<<<<<<<
  *                   formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
  */
 
 /* Python wrapper */
 static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds); /*proto*/
-static char __pyx_doc_10pyreadstat_10pyreadstat_read_sas7bdat[] = "\n    Read a SAS sas7bdat file.\n    It accepts the path to a sas7bcat.\n    \n    Parameters\n    ----------\n        filename_path : str, bytes or Path-like object\n            path to the file. In python 2.7 the string is assumed to be utf-8 encoded.\n        metadataonly : bool, optional\n            by default False. IF true, no data will be read but only metadata, so that you can get all elements in the\n            metadata object. The data frame will be set with the correct column names but no data.\n        dates_as_pandas_datetime : bool, optional\n            by default False. If true dates will be transformed to pandas datetime64 instead of date.\n        catalog_file : str, optional\n            path to a sas7bcat file. By default is None. If not None, will parse the catalog file and replace the values\n            by the formats in the catalog, if any appropiate is found. If this is not the behavior you are looking for,\n            Use read_sas7bcat to parse the catalog independently\n            of the sas7bdat and set_catalog_to_sas to apply the resulting format into sas7bdat files.\n        formats_as_category : bool, optional\n            Will take effect only if the catalog_file was specified. If True the variables whose values were replaced\n            by the formats will be transformed into pandas categories.\n        formats_as_ordered_category : bool, optional\n            defaults to False. If True the variables having formats will be transformed into pandas ordered categories.\n            it has precedence over formats_as_category, meaning if this is True, it will take effect irrespective of\n            the value of formats_as_category.\n        encoding : str, optional\n            Defaults to None. If set, the system will use the defined encoding instead of guessing it. It has to be an\n            iconv-compatible name\n        usecols : list, optional\n            a list with column names to read from the file. Only those columns wil""l be imported. Case sensitive!\n        user_missing : bool, optional\n            by default False, in this case user defined missing values are delivered as nan. If true, the missing values\n            will be deliver as is, and an extra piece of information will be set in the metadata (missing_user_values)\n            to be able to interpret those values as missing.\n        disable_datetime_conversion : bool, optional\n            if True pyreadstat will not attempt to convert dates, datetimes and times to python objects but those columns\n            will remain as numbers. In order to convert them later to an appropiate python object, the user can use the\n            information about the original variable format stored in the metadata object in original_variable_types.\n            Disabling datetime conversion speeds up reading files. In addition it helps to overcome situations where\n            there are datetimes that are beyond the limits of python datetime (which is limited to year 10,000, dates\n            beyond that will rise an Overflow error in pyreadstat).\n        row_limit : int, optional\n            maximum number of rows to read. The default is 0 meaning unlimited.\n        row_offset : int, optional\n            start reading rows after this offset. By default 0, meaning start with the first row not skipping anything.\n        output_format : str, optional\n            one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the\n            user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas\n            dataframe is avoided.\n\n    Returns\n    -------\n        data_frame : pandas dataframe\n            a pandas data frame with the data. If the output_format is other than 'pandas' the object type will change accordingly.\n        metadata\n            object with metadata. The members variables_value_labels will be ""empty unless a valid catalog file is\n            supplied.\n            Look at the documentation for more information.\n    ";
+static char __pyx_doc_10pyreadstat_10pyreadstat_read_sas7bdat[] = "\n    Read a SAS sas7bdat file.\n    It accepts the path to a sas7bcat.\n    \n    Parameters\n    ----------\n        filename_path : str, bytes or Path-like object\n            path to the file. In python 2.7 the string is assumed to be utf-8 encoded.\n        metadataonly : bool, optional\n            by default False. IF true, no data will be read but only metadata, so that you can get all elements in the\n            metadata object. The data frame will be set with the correct column names but no data.\n        dates_as_pandas_datetime : bool, optional\n            by default False. If true dates will be transformed to pandas datetime64 instead of date.\n        catalog_file : str, optional\n            path to a sas7bcat file. By default is None. If not None, will parse the catalog file and replace the values\n            by the formats in the catalog, if any appropiate is found. If this is not the behavior you are looking for,\n            Use read_sas7bcat to parse the catalog independently\n            of the sas7bdat and set_catalog_to_sas to apply the resulting format into sas7bdat files.\n        formats_as_category : bool, optional\n            Will take effect only if the catalog_file was specified. If True the variables whose values were replaced\n            by the formats will be transformed into pandas categories.\n        formats_as_ordered_category : bool, optional\n            defaults to False. If True the variables having formats will be transformed into pandas ordered categories.\n            it has precedence over formats_as_category, meaning if this is True, it will take effect irrespective of\n            the value of formats_as_category.\n        encoding : str, optional\n            Defaults to None. If set, the system will use the defined encoding instead of guessing it. It has to be an\n            iconv-compatible name\n        usecols : list, optional\n            a list with column names to read from the file. Only those columns wil""l be imported. Case sensitive!\n        user_missing : bool, optional\n            by default False, in this case user defined missing values are delivered as nan. If true, the missing values\n            will be deliver as is, and an extra piece of information will be set in the metadata (missing_user_values)\n            to be able to interpret those values as missing.\n        disable_datetime_conversion : bool, optional\n            if True pyreadstat will not attempt to convert dates, datetimes and times to python objects but those columns\n            will remain as numbers. In order to convert them later to an appropiate python object, the user can use the\n            information about the original variable format stored in the metadata object in original_variable_types.\n            Disabling datetime conversion speeds up reading files. In addition it helps to overcome situations where\n            there are datetimes that are beyond the limits of python datetime (which is limited to year 10,000, dates\n            beyond that will rise an Overflow error in pyreadstat).\n        row_limit : int, optional\n            maximum number of rows to read. The default is 0 meaning unlimited.\n        row_offset : int, optional\n            start reading rows after this offset. By default 0, meaning start with the first row not skipping anything.\n        output_format : str, optional\n            one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the\n            user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas\n            dataframe is avoided.\n        extra_datetime_formats: list of str, optional\n            formats to be parsed as python datetime objects\n        extra_date_formats: list of str, optional\n            formats to be parsed as python date objects\n            \n\n    Returns\n    -------\n        data_frame : pandas d""ataframe\n            a pandas data frame with the data. If the output_format is other than 'pandas' the object type will change accordingly.\n        metadata\n            object with metadata. The members variables_value_labels will be empty unless a valid catalog file is\n            supplied.\n            Look at the documentation for more information.\n    ";
 static PyMethodDef __pyx_mdef_10pyreadstat_10pyreadstat_1read_sas7bdat = {"read_sas7bdat", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat, METH_VARARGS|METH_KEYWORDS, __pyx_doc_10pyreadstat_10pyreadstat_read_sas7bdat};
 static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds) {
   PyObject *__pyx_v_filename_path = 0;
@@ -2250,6 +2255,8 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat(PyObject *__p
   int __pyx_v_row_limit;
   int __pyx_v_row_offset;
   PyObject *__pyx_v_output_format = 0;
+  PyObject *__pyx_v_extra_datetime_formats = 0;
+  PyObject *__pyx_v_extra_date_formats = 0;
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
@@ -2257,8 +2264,8 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat(PyObject *__p
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("read_sas7bdat (wrapper)", 0);
   {
-    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_filename_path,&__pyx_n_s_metadataonly,&__pyx_n_s_dates_as_pandas_datetime,&__pyx_n_s_catalog_file,&__pyx_n_s_formats_as_category,&__pyx_n_s_formats_as_ordered_category,&__pyx_n_s_encoding,&__pyx_n_s_usecols,&__pyx_n_s_user_missing,&__pyx_n_s_disable_datetime_conversion,&__pyx_n_s_row_limit,&__pyx_n_s_row_offset,&__pyx_n_s_output_format,0};
-    PyObject* values[13] = {0,0,0,0,0,0,0,0,0,0,0,0,0};
+    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_filename_path,&__pyx_n_s_metadataonly,&__pyx_n_s_dates_as_pandas_datetime,&__pyx_n_s_catalog_file,&__pyx_n_s_formats_as_category,&__pyx_n_s_formats_as_ordered_category,&__pyx_n_s_encoding,&__pyx_n_s_usecols,&__pyx_n_s_user_missing,&__pyx_n_s_disable_datetime_conversion,&__pyx_n_s_row_limit,&__pyx_n_s_row_offset,&__pyx_n_s_output_format,&__pyx_n_s_extra_datetime_formats,&__pyx_n_s_extra_date_formats,0};
+    PyObject* values[15] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
     values[1] = ((PyObject *)Py_False);
     values[2] = ((PyObject *)Py_False);
     values[3] = ((PyObject *)Py_None);
@@ -2267,8 +2274,8 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat(PyObject *__p
  * 
  * def read_sas7bdat(filename_path, metadataonly=False, dates_as_pandas_datetime=False, catalog_file=None,
  *                   formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,             # <<<<<<<<<<<<<<
- *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
- *     r"""
+ *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
+ *                   list extra_datetime_formats=None, list extra_date_formats=None):
  */
     values[4] = ((PyObject *)Py_True);
     values[5] = ((PyObject *)Py_False);
@@ -2279,16 +2286,30 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat(PyObject *__p
     /* "pyreadstat/pyreadstat.pyx":43
  * def read_sas7bdat(filename_path, metadataonly=False, dates_as_pandas_datetime=False, catalog_file=None,
  *                   formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):             # <<<<<<<<<<<<<<
+ *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,             # <<<<<<<<<<<<<<
+ *                   list extra_datetime_formats=None, list extra_date_formats=None):
  *     r"""
- *     Read a SAS sas7bdat file.
  */
     values[9] = ((PyObject *)Py_False);
     values[12] = ((PyObject*)Py_None);
+
+    /* "pyreadstat/pyreadstat.pyx":44
+ *                   formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
+ *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
+ *                   list extra_datetime_formats=None, list extra_date_formats=None):             # <<<<<<<<<<<<<<
+ *     r"""
+ *     Read a SAS sas7bdat file.
+ */
+    values[13] = ((PyObject*)Py_None);
+    values[14] = ((PyObject*)Py_None);
     if (unlikely(__pyx_kwds)) {
       Py_ssize_t kw_args;
       const Py_ssize_t pos_args = PyTuple_GET_SIZE(__pyx_args);
       switch (pos_args) {
+        case 15: values[14] = PyTuple_GET_ITEM(__pyx_args, 14);
+        CYTHON_FALLTHROUGH;
+        case 14: values[13] = PyTuple_GET_ITEM(__pyx_args, 13);
+        CYTHON_FALLTHROUGH;
         case 13: values[12] = PyTuple_GET_ITEM(__pyx_args, 12);
         CYTHON_FALLTHROUGH;
         case 12: values[11] = PyTuple_GET_ITEM(__pyx_args, 11);
@@ -2395,12 +2416,28 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat(PyObject *__p
           PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_output_format);
           if (value) { values[12] = value; kw_args--; }
         }
+        CYTHON_FALLTHROUGH;
+        case 13:
+        if (kw_args > 0) {
+          PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_extra_datetime_formats);
+          if (value) { values[13] = value; kw_args--; }
+        }
+        CYTHON_FALLTHROUGH;
+        case 14:
+        if (kw_args > 0) {
+          PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_extra_date_formats);
+          if (value) { values[14] = value; kw_args--; }
+        }
       }
       if (unlikely(kw_args > 0)) {
         if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "read_sas7bdat") < 0)) __PYX_ERR(0, 41, __pyx_L3_error)
       }
     } else {
       switch (PyTuple_GET_SIZE(__pyx_args)) {
+        case 15: values[14] = PyTuple_GET_ITEM(__pyx_args, 14);
+        CYTHON_FALLTHROUGH;
+        case 14: values[13] = PyTuple_GET_ITEM(__pyx_args, 13);
+        CYTHON_FALLTHROUGH;
         case 13: values[12] = PyTuple_GET_ITEM(__pyx_args, 12);
         CYTHON_FALLTHROUGH;
         case 12: values[11] = PyTuple_GET_ITEM(__pyx_args, 11);
@@ -2451,10 +2488,12 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat(PyObject *__p
       __pyx_v_row_offset = ((int)0);
     }
     __pyx_v_output_format = ((PyObject*)values[12]);
+    __pyx_v_extra_datetime_formats = ((PyObject*)values[13]);
+    __pyx_v_extra_date_formats = ((PyObject*)values[14]);
   }
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L5_argtuple_error:;
-  __Pyx_RaiseArgtupleInvalid("read_sas7bdat", 0, 1, 13, PyTuple_GET_SIZE(__pyx_args)); __PYX_ERR(0, 41, __pyx_L3_error)
+  __Pyx_RaiseArgtupleInvalid("read_sas7bdat", 0, 1, 15, PyTuple_GET_SIZE(__pyx_args)); __PYX_ERR(0, 41, __pyx_L3_error)
   __pyx_L3_error:;
   __Pyx_AddTraceback("pyreadstat.pyreadstat.read_sas7bdat", __pyx_clineno, __pyx_lineno, __pyx_filename);
   __Pyx_RefNannyFinishContext();
@@ -2463,14 +2502,16 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat(PyObject *__p
   if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_encoding), (&PyString_Type), 1, "encoding", 1))) __PYX_ERR(0, 42, __pyx_L1_error)
   if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_usecols), (&PyList_Type), 1, "usecols", 1))) __PYX_ERR(0, 42, __pyx_L1_error)
   if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_output_format), (&PyString_Type), 1, "output_format", 1))) __PYX_ERR(0, 43, __pyx_L1_error)
-  __pyx_r = __pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(__pyx_self, __pyx_v_filename_path, __pyx_v_metadataonly, __pyx_v_dates_as_pandas_datetime, __pyx_v_catalog_file, __pyx_v_formats_as_category, __pyx_v_formats_as_ordered_category, __pyx_v_encoding, __pyx_v_usecols, __pyx_v_user_missing, __pyx_v_disable_datetime_conversion, __pyx_v_row_limit, __pyx_v_row_offset, __pyx_v_output_format);
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_extra_datetime_formats), (&PyList_Type), 1, "extra_datetime_formats", 1))) __PYX_ERR(0, 44, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_extra_date_formats), (&PyList_Type), 1, "extra_date_formats", 1))) __PYX_ERR(0, 44, __pyx_L1_error)
+  __pyx_r = __pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(__pyx_self, __pyx_v_filename_path, __pyx_v_metadataonly, __pyx_v_dates_as_pandas_datetime, __pyx_v_catalog_file, __pyx_v_formats_as_category, __pyx_v_formats_as_ordered_category, __pyx_v_encoding, __pyx_v_usecols, __pyx_v_user_missing, __pyx_v_disable_datetime_conversion, __pyx_v_row_limit, __pyx_v_row_offset, __pyx_v_output_format, __pyx_v_extra_datetime_formats, __pyx_v_extra_date_formats);
 
   /* "pyreadstat/pyreadstat.pyx":41
  * # Parsing functions
  * 
  * def read_sas7bdat(filename_path, metadataonly=False, dates_as_pandas_datetime=False, catalog_file=None,             # <<<<<<<<<<<<<<
  *                   formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
  */
 
   /* function exit code */
@@ -2482,7 +2523,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_1read_sas7bdat(PyObject *__p
   return __pyx_r;
 }
 
-static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_catalog_file, PyObject *__pyx_v_formats_as_category, PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_user_missing, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format) {
+static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_catalog_file, PyObject *__pyx_v_formats_as_category, PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_user_missing, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format, PyObject *__pyx_v_extra_datetime_formats, PyObject *__pyx_v_extra_date_formats) {
   int __pyx_v_metaonly;
   int __pyx_v_dates_as_pandas;
   int __pyx_v_usernan;
@@ -2505,7 +2546,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("read_sas7bdat", 0);
 
-  /* "pyreadstat/pyreadstat.pyx":104
+  /* "pyreadstat/pyreadstat.pyx":110
  *     """
  * 
  *     cdef bint metaonly = 0             # <<<<<<<<<<<<<<
@@ -2514,17 +2555,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
   __pyx_v_metaonly = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":105
+  /* "pyreadstat/pyreadstat.pyx":111
  * 
  *     cdef bint metaonly = 0
  *     if metadataonly:             # <<<<<<<<<<<<<<
  *         metaonly = 1
  * 
  */
-  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_metadataonly); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 105, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_metadataonly); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 111, __pyx_L1_error)
   if (__pyx_t_1) {
 
-    /* "pyreadstat/pyreadstat.pyx":106
+    /* "pyreadstat/pyreadstat.pyx":112
  *     cdef bint metaonly = 0
  *     if metadataonly:
  *         metaonly = 1             # <<<<<<<<<<<<<<
@@ -2533,7 +2574,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
     __pyx_v_metaonly = 1;
 
-    /* "pyreadstat/pyreadstat.pyx":105
+    /* "pyreadstat/pyreadstat.pyx":111
  * 
  *     cdef bint metaonly = 0
  *     if metadataonly:             # <<<<<<<<<<<<<<
@@ -2542,7 +2583,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
   }
 
-  /* "pyreadstat/pyreadstat.pyx":108
+  /* "pyreadstat/pyreadstat.pyx":114
  *         metaonly = 1
  * 
  *     cdef bint dates_as_pandas = 0             # <<<<<<<<<<<<<<
@@ -2551,17 +2592,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
   __pyx_v_dates_as_pandas = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":109
+  /* "pyreadstat/pyreadstat.pyx":115
  * 
  *     cdef bint dates_as_pandas = 0
  *     if dates_as_pandas_datetime:             # <<<<<<<<<<<<<<
  *         dates_as_pandas = 1
  * 
  */
-  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_dates_as_pandas_datetime); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 109, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_dates_as_pandas_datetime); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 115, __pyx_L1_error)
   if (__pyx_t_1) {
 
-    /* "pyreadstat/pyreadstat.pyx":110
+    /* "pyreadstat/pyreadstat.pyx":116
  *     cdef bint dates_as_pandas = 0
  *     if dates_as_pandas_datetime:
  *         dates_as_pandas = 1             # <<<<<<<<<<<<<<
@@ -2570,7 +2611,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
     __pyx_v_dates_as_pandas = 1;
 
-    /* "pyreadstat/pyreadstat.pyx":109
+    /* "pyreadstat/pyreadstat.pyx":115
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  *     cdef bint dates_as_pandas = 0
  *     if dates_as_pandas_datetime:             # <<<<<<<<<<<<<<
@@ -2579,7 +2620,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
   }
 
-  /* "pyreadstat/pyreadstat.pyx":112
+  /* "pyreadstat/pyreadstat.pyx":118
  *         dates_as_pandas = 1
  * 
  *     cdef bint usernan = 0             # <<<<<<<<<<<<<<
@@ -2588,17 +2629,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
   __pyx_v_usernan = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":113
+  /* "pyreadstat/pyreadstat.pyx":119
  * 
  *     cdef bint usernan = 0
  *     if user_missing:             # <<<<<<<<<<<<<<
  *         usernan = 1
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-  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_user_missing); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 113, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_user_missing); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 119, __pyx_L1_error)
   if (__pyx_t_1) {
 
-    /* "pyreadstat/pyreadstat.pyx":114
+    /* "pyreadstat/pyreadstat.pyx":120
  *     cdef bint usernan = 0
  *     if user_missing:
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@@ -2607,7 +2648,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
     __pyx_v_usernan = 1;
 
-    /* "pyreadstat/pyreadstat.pyx":113
+    /* "pyreadstat/pyreadstat.pyx":119
  * 
  *     cdef bint usernan = 0
  *     if user_missing:             # <<<<<<<<<<<<<<
@@ -2616,7 +2657,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
   }
 
-  /* "pyreadstat/pyreadstat.pyx":116
+  /* "pyreadstat/pyreadstat.pyx":122
  *         usernan = 1
  * 
  *     cdef bint no_datetime_conversion = 0             # <<<<<<<<<<<<<<
@@ -2625,17 +2666,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
   __pyx_v_no_datetime_conversion = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":117
+  /* "pyreadstat/pyreadstat.pyx":123
  * 
  *     cdef bint no_datetime_conversion = 0
  *     if disable_datetime_conversion:             # <<<<<<<<<<<<<<
  *         no_datetime_conversion = 1
  * 
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-  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_disable_datetime_conversion); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 117, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_disable_datetime_conversion); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 123, __pyx_L1_error)
   if (__pyx_t_1) {
 
-    /* "pyreadstat/pyreadstat.pyx":118
+    /* "pyreadstat/pyreadstat.pyx":124
  *     cdef bint no_datetime_conversion = 0
  *     if disable_datetime_conversion:
  *         no_datetime_conversion = 1             # <<<<<<<<<<<<<<
@@ -2644,7 +2685,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
     __pyx_v_no_datetime_conversion = 1;
 
-    /* "pyreadstat/pyreadstat.pyx":117
+    /* "pyreadstat/pyreadstat.pyx":123
  * 
  *     cdef bint no_datetime_conversion = 0
  *     if disable_datetime_conversion:             # <<<<<<<<<<<<<<
@@ -2653,7 +2694,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
  */
   }
 
-  /* "pyreadstat/pyreadstat.pyx":120
+  /* "pyreadstat/pyreadstat.pyx":126
  *         no_datetime_conversion = 1
  * 
  *     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_SAS             # <<<<<<<<<<<<<<
@@ -2662,14 +2703,14 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
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   __pyx_v_file_format = __pyx_e_10pyreadstat_16_readstat_parser_FILE_FORMAT_SAS;
 
-  /* "pyreadstat/pyreadstat.pyx":121
+  /* "pyreadstat/pyreadstat.pyx":127
  * 
  *     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_SAS
  *     data_frame, metadata = run_conversion(filename_path, file_format, readstat_parse_sas7bdat, encoding, metaonly,             # <<<<<<<<<<<<<<
  *                                           dates_as_pandas, usecols, usernan, no_datetime_conversion, <long>row_limit, <long>row_offset,
- *                                           output_format)
+ *                                           output_format, extra_datetime_formats, extra_date_formats)
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-  __pyx_t_2 = __pyx_f_10pyreadstat_16_readstat_parser_run_conversion(__pyx_v_filename_path, __pyx_v_file_format, readstat_parse_sas7bdat, __pyx_v_encoding, __pyx_v_metaonly, __pyx_v_dates_as_pandas, __pyx_v_usecols, __pyx_v_usernan, __pyx_v_no_datetime_conversion, ((long)__pyx_v_row_limit), ((long)__pyx_v_row_offset), __pyx_v_output_format); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 121, __pyx_L1_error)
+  __pyx_t_2 = __pyx_f_10pyreadstat_16_readstat_parser_run_conversion(__pyx_v_filename_path, __pyx_v_file_format, readstat_parse_sas7bdat, __pyx_v_encoding, __pyx_v_metaonly, __pyx_v_dates_as_pandas, __pyx_v_usecols, __pyx_v_usernan, __pyx_v_no_datetime_conversion, ((long)__pyx_v_row_limit), ((long)__pyx_v_row_offset), __pyx_v_output_format, __pyx_v_extra_datetime_formats, __pyx_v_extra_date_formats); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 127, __pyx_L1_error)
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@@ -2677,7 +2718,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
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@@ -2690,15 +2731,15 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
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@@ -2769,7 +2810,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
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-    /* "pyreadstat/pyreadstat.pyx":128
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+    __Pyx_GetModuleGlobalName(__pyx_t_5, __pyx_n_s_set_catalog_to_sas); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 134, __pyx_L1_error)
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-    __pyx_t_4 = PyTuple_New(3); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 128, __pyx_L1_error)
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-    /* "pyreadstat/pyreadstat.pyx":129
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-    /* "pyreadstat/pyreadstat.pyx":128
+    /* "pyreadstat/pyreadstat.pyx":134
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+    __pyx_t_2 = __Pyx_PyObject_Call(__pyx_t_5, __pyx_t_4, __pyx_t_3); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 134, __pyx_L1_error)
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@@ -2865,7 +2906,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_read_sas7bdat(CYTHON_UNUSED
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 }
 
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 /* Python wrapper */
 static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_3read_xport(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds); /*proto*/
-static char __pyx_doc_10pyreadstat_10pyreadstat_2read_xport[] = "\n    Read a SAS xport file.\n\n    Parameters\n    ----------\n        filename_path : str, bytes or Path-like object\n            path to the file. In python 2.7 the string is assumed to be utf-8 encoded\n        metadataonly : bool, optional\n            by default False. IF true, no data will be read but only metadata, so that you can get all elements in the\n            metadata object. The data frame will be set with the correct column names but no data.\n            Notice that number_rows will be None as xport files do not have the number of rows recorded in the file metadata.\n        dates_as_pandas_datetime : bool, optional\n            by default False. If true dates will be transformed to pandas datetime64 instead of date.\n        encoding : str, optional\n            Defaults to None. If set, the system will use the defined encoding instead of guessing it. It has to be an\n            iconv-compatible name\n        usecols : list, optional\n            a list with column names to read from the file. Only those columns will be imported. Case sensitive!\n        disable_datetime_conversion : bool, optional\n            if True pyreadstat will not attempt to convert dates, datetimes and times to python objects but those columns\n            will remain as numbers. In order to convert them later to an appropiate python object, the user can use the\n            information about the original variable format stored in the metadata object in original_variable_types.\n            Disabling datetime conversion speeds up reading files. In addition it helps to overcome situations where\n            there are datetimes that are beyond the limits of python datetime (which is limited to year 10,000, dates\n            beyond that will rise an Overflow error in pyreadstat).\n        row_limit : int, optional\n            maximum number of rows to read. The default is 0 meaning unlimited.\n        row_offset : int, optional\n            start reading rows after this ""offset. By default 0, meaning start with the first row not skipping anything.\n        output_format : str, optional\n            one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the\n            user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas\n            dataframe is avoided.\n\n    Returns\n    -------\n        data_frame : pandas dataframe\n            a pandas data frame with the data. If the output_format is other than 'pandas' the object type will change accordingly.\n        metadata :\n            object with metadata. Look at the documentation for more information.\n    ";
+static char __pyx_doc_10pyreadstat_10pyreadstat_2read_xport[] = "\n    Read a SAS xport file.\n\n    Parameters\n    ----------\n        filename_path : str, bytes or Path-like object\n            path to the file. In python 2.7 the string is assumed to be utf-8 encoded\n        metadataonly : bool, optional\n            by default False. IF true, no data will be read but only metadata, so that you can get all elements in the\n            metadata object. The data frame will be set with the correct column names but no data.\n            Notice that number_rows will be None as xport files do not have the number of rows recorded in the file metadata.\n        dates_as_pandas_datetime : bool, optional\n            by default False. If true dates will be transformed to pandas datetime64 instead of date.\n        encoding : str, optional\n            Defaults to None. If set, the system will use the defined encoding instead of guessing it. It has to be an\n            iconv-compatible name\n        usecols : list, optional\n            a list with column names to read from the file. Only those columns will be imported. Case sensitive!\n        disable_datetime_conversion : bool, optional\n            if True pyreadstat will not attempt to convert dates, datetimes and times to python objects but those columns\n            will remain as numbers. In order to convert them later to an appropiate python object, the user can use the\n            information about the original variable format stored in the metadata object in original_variable_types.\n            Disabling datetime conversion speeds up reading files. In addition it helps to overcome situations where\n            there are datetimes that are beyond the limits of python datetime (which is limited to year 10,000, dates\n            beyond that will rise an Overflow error in pyreadstat).\n        row_limit : int, optional\n            maximum number of rows to read. The default is 0 meaning unlimited.\n        row_offset : int, optional\n            start reading rows after this ""offset. By default 0, meaning start with the first row not skipping anything.\n        output_format : str, optional\n            one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the\n            user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas\n            dataframe is avoided.\n        extra_datetime_formats: list of str, optional\n            formats to be parsed as python datetime objects\n        extra_date_formats: list of str, optional\n            formats to be parsed as python date objects\n\n    Returns\n    -------\n        data_frame : pandas dataframe\n            a pandas data frame with the data. If the output_format is other than 'pandas' the object type will change accordingly.\n        metadata :\n            object with metadata. Look at the documentation for more information.\n    ";
 static PyMethodDef __pyx_mdef_10pyreadstat_10pyreadstat_3read_xport = {"read_xport", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_10pyreadstat_10pyreadstat_3read_xport, METH_VARARGS|METH_KEYWORDS, __pyx_doc_10pyreadstat_10pyreadstat_2read_xport};
 static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_3read_xport(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds) {
   PyObject *__pyx_v_filename_path = 0;
@@ -2987,6 +3028,8 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_3read_xport(PyObject *__pyx_
   int __pyx_v_row_limit;
   int __pyx_v_row_offset;
   PyObject *__pyx_v_output_format = 0;
+  PyObject *__pyx_v_extra_datetime_formats = 0;
+  PyObject *__pyx_v_extra_date_formats = 0;
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
@@ -2994,34 +3037,40 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_3read_xport(PyObject *__pyx_
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("read_xport (wrapper)", 0);
   {
-    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_filename_path,&__pyx_n_s_metadataonly,&__pyx_n_s_dates_as_pandas_datetime,&__pyx_n_s_encoding,&__pyx_n_s_usecols,&__pyx_n_s_disable_datetime_conversion,&__pyx_n_s_row_limit,&__pyx_n_s_row_offset,&__pyx_n_s_output_format,0};
-    PyObject* values[9] = {0,0,0,0,0,0,0,0,0};
+    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_filename_path,&__pyx_n_s_metadataonly,&__pyx_n_s_dates_as_pandas_datetime,&__pyx_n_s_encoding,&__pyx_n_s_usecols,&__pyx_n_s_disable_datetime_conversion,&__pyx_n_s_row_limit,&__pyx_n_s_row_offset,&__pyx_n_s_output_format,&__pyx_n_s_extra_datetime_formats,&__pyx_n_s_extra_date_formats,0};
+    PyObject* values[11] = {0,0,0,0,0,0,0,0,0,0,0};
     values[1] = ((PyObject *)Py_False);
     values[2] = ((PyObject *)Py_False);
     values[3] = ((PyObject*)Py_None);
 
-    /* "pyreadstat/pyreadstat.pyx":135
+    /* "pyreadstat/pyreadstat.pyx":141
  * 
  * def read_xport(filename_path, metadataonly=False, dates_as_pandas_datetime=False, str encoding=None,
  *                list usecols=None, disable_datetime_conversion=False, int row_limit=0, int row_offset=0,             # <<<<<<<<<<<<<<
- *                str output_format=None):
+ *                str output_format=None, list extra_datetime_formats=None, list extra_date_formats=None):
  *     r"""
  */
     values[4] = ((PyObject*)Py_None);
     values[5] = ((PyObject *)Py_False);
 
-    /* "pyreadstat/pyreadstat.pyx":136
+    /* "pyreadstat/pyreadstat.pyx":142
  * def read_xport(filename_path, metadataonly=False, dates_as_pandas_datetime=False, str encoding=None,
  *                list usecols=None, disable_datetime_conversion=False, int row_limit=0, int row_offset=0,
- *                str output_format=None):             # <<<<<<<<<<<<<<
+ *                str output_format=None, list extra_datetime_formats=None, list extra_date_formats=None):             # <<<<<<<<<<<<<<
  *     r"""
  *     Read a SAS xport file.
  */
     values[8] = ((PyObject*)Py_None);
+    values[9] = ((PyObject*)Py_None);
+    values[10] = ((PyObject*)Py_None);
     if (unlikely(__pyx_kwds)) {
       Py_ssize_t kw_args;
       const Py_ssize_t pos_args = PyTuple_GET_SIZE(__pyx_args);
       switch (pos_args) {
+        case 11: values[10] = PyTuple_GET_ITEM(__pyx_args, 10);
+        CYTHON_FALLTHROUGH;
+        case 10: values[9] = PyTuple_GET_ITEM(__pyx_args, 9);
+        CYTHON_FALLTHROUGH;
         case  9: values[8] = PyTuple_GET_ITEM(__pyx_args, 8);
         CYTHON_FALLTHROUGH;
         case  8: values[7] = PyTuple_GET_ITEM(__pyx_args, 7);
@@ -3096,12 +3145,28 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_3read_xport(PyObject *__pyx_
           PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_output_format);
           if (value) { values[8] = value; kw_args--; }
         }
+        CYTHON_FALLTHROUGH;
+        case  9:
+        if (kw_args > 0) {
+          PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_extra_datetime_formats);
+          if (value) { values[9] = value; kw_args--; }
+        }
+        CYTHON_FALLTHROUGH;
+        case 10:
+        if (kw_args > 0) {
+          PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_extra_date_formats);
+          if (value) { values[10] = value; kw_args--; }
+        }
       }
       if (unlikely(kw_args > 0)) {
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "read_xport") < 0)) __PYX_ERR(0, 134, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "read_xport") < 0)) __PYX_ERR(0, 140, __pyx_L3_error)
       }
     } else {
       switch (PyTuple_GET_SIZE(__pyx_args)) {
+        case 11: values[10] = PyTuple_GET_ITEM(__pyx_args, 10);
+        CYTHON_FALLTHROUGH;
+        case 10: values[9] = PyTuple_GET_ITEM(__pyx_args, 9);
+        CYTHON_FALLTHROUGH;
         case  9: values[8] = PyTuple_GET_ITEM(__pyx_args, 8);
         CYTHON_FALLTHROUGH;
         case  8: values[7] = PyTuple_GET_ITEM(__pyx_args, 7);
@@ -3130,36 +3195,40 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_3read_xport(PyObject *__pyx_
     __pyx_v_usecols = ((PyObject*)values[4]);
     __pyx_v_disable_datetime_conversion = values[5];
     if (values[6]) {
-      __pyx_v_row_limit = __Pyx_PyInt_As_int(values[6]); if (unlikely((__pyx_v_row_limit == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 135, __pyx_L3_error)
+      __pyx_v_row_limit = __Pyx_PyInt_As_int(values[6]); if (unlikely((__pyx_v_row_limit == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 141, __pyx_L3_error)
     } else {
       __pyx_v_row_limit = ((int)0);
     }
     if (values[7]) {
-      __pyx_v_row_offset = __Pyx_PyInt_As_int(values[7]); if (unlikely((__pyx_v_row_offset == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 135, __pyx_L3_error)
+      __pyx_v_row_offset = __Pyx_PyInt_As_int(values[7]); if (unlikely((__pyx_v_row_offset == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 141, __pyx_L3_error)
     } else {
       __pyx_v_row_offset = ((int)0);
     }
     __pyx_v_output_format = ((PyObject*)values[8]);
+    __pyx_v_extra_datetime_formats = ((PyObject*)values[9]);
+    __pyx_v_extra_date_formats = ((PyObject*)values[10]);
   }
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L5_argtuple_error:;
-  __Pyx_RaiseArgtupleInvalid("read_xport", 0, 1, 9, PyTuple_GET_SIZE(__pyx_args)); __PYX_ERR(0, 134, __pyx_L3_error)
+  __Pyx_RaiseArgtupleInvalid("read_xport", 0, 1, 11, PyTuple_GET_SIZE(__pyx_args)); __PYX_ERR(0, 140, __pyx_L3_error)
   __pyx_L3_error:;
   __Pyx_AddTraceback("pyreadstat.pyreadstat.read_xport", __pyx_clineno, __pyx_lineno, __pyx_filename);
   __Pyx_RefNannyFinishContext();
   return NULL;
   __pyx_L4_argument_unpacking_done:;
-  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_encoding), (&PyString_Type), 1, "encoding", 1))) __PYX_ERR(0, 134, __pyx_L1_error)
-  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_usecols), (&PyList_Type), 1, "usecols", 1))) __PYX_ERR(0, 135, __pyx_L1_error)
-  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_output_format), (&PyString_Type), 1, "output_format", 1))) __PYX_ERR(0, 136, __pyx_L1_error)
-  __pyx_r = __pyx_pf_10pyreadstat_10pyreadstat_2read_xport(__pyx_self, __pyx_v_filename_path, __pyx_v_metadataonly, __pyx_v_dates_as_pandas_datetime, __pyx_v_encoding, __pyx_v_usecols, __pyx_v_disable_datetime_conversion, __pyx_v_row_limit, __pyx_v_row_offset, __pyx_v_output_format);
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_encoding), (&PyString_Type), 1, "encoding", 1))) __PYX_ERR(0, 140, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_usecols), (&PyList_Type), 1, "usecols", 1))) __PYX_ERR(0, 141, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_output_format), (&PyString_Type), 1, "output_format", 1))) __PYX_ERR(0, 142, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_extra_datetime_formats), (&PyList_Type), 1, "extra_datetime_formats", 1))) __PYX_ERR(0, 142, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_extra_date_formats), (&PyList_Type), 1, "extra_date_formats", 1))) __PYX_ERR(0, 142, __pyx_L1_error)
+  __pyx_r = __pyx_pf_10pyreadstat_10pyreadstat_2read_xport(__pyx_self, __pyx_v_filename_path, __pyx_v_metadataonly, __pyx_v_dates_as_pandas_datetime, __pyx_v_encoding, __pyx_v_usecols, __pyx_v_disable_datetime_conversion, __pyx_v_row_limit, __pyx_v_row_offset, __pyx_v_output_format, __pyx_v_extra_datetime_formats, __pyx_v_extra_date_formats);
 
-  /* "pyreadstat/pyreadstat.pyx":134
+  /* "pyreadstat/pyreadstat.pyx":140
  * 
  * 
  * def read_xport(filename_path, metadataonly=False, dates_as_pandas_datetime=False, str encoding=None,             # <<<<<<<<<<<<<<
  *                list usecols=None, disable_datetime_conversion=False, int row_limit=0, int row_offset=0,
- *                str output_format=None):
+ *                str output_format=None, list extra_datetime_formats=None, list extra_date_formats=None):
  */
 
   /* function exit code */
@@ -3171,7 +3240,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_3read_xport(PyObject *__pyx_
   return __pyx_r;
 }
 
-static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format) {
+static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format, PyObject *__pyx_v_extra_datetime_formats, PyObject *__pyx_v_extra_date_formats) {
   int __pyx_v_metaonly;
   int __pyx_v_dates_as_pandas;
   int __pyx_v_usernan;
@@ -3192,7 +3261,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("read_xport", 0);
 
-  /* "pyreadstat/pyreadstat.pyx":179
+  /* "pyreadstat/pyreadstat.pyx":189
  *     """
  * 
  *     cdef bint metaonly = 0             # <<<<<<<<<<<<<<
@@ -3201,17 +3270,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
   __pyx_v_metaonly = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":180
+  /* "pyreadstat/pyreadstat.pyx":190
  * 
  *     cdef bint metaonly = 0
  *     if metadataonly:             # <<<<<<<<<<<<<<
  *         metaonly = 1
  * 
  */
-  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_metadataonly); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 180, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_metadataonly); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 190, __pyx_L1_error)
   if (__pyx_t_1) {
 
-    /* "pyreadstat/pyreadstat.pyx":181
+    /* "pyreadstat/pyreadstat.pyx":191
  *     cdef bint metaonly = 0
  *     if metadataonly:
  *         metaonly = 1             # <<<<<<<<<<<<<<
@@ -3220,7 +3289,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
     __pyx_v_metaonly = 1;
 
-    /* "pyreadstat/pyreadstat.pyx":180
+    /* "pyreadstat/pyreadstat.pyx":190
  * 
  *     cdef bint metaonly = 0
  *     if metadataonly:             # <<<<<<<<<<<<<<
@@ -3229,7 +3298,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
   }
 
-  /* "pyreadstat/pyreadstat.pyx":183
+  /* "pyreadstat/pyreadstat.pyx":193
  *         metaonly = 1
  * 
  *     cdef bint dates_as_pandas = 0             # <<<<<<<<<<<<<<
@@ -3238,17 +3307,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
   __pyx_v_dates_as_pandas = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":184
+  /* "pyreadstat/pyreadstat.pyx":194
  * 
  *     cdef bint dates_as_pandas = 0
  *     if dates_as_pandas_datetime:             # <<<<<<<<<<<<<<
  *         dates_as_pandas = 1
  * 
  */
-  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_dates_as_pandas_datetime); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 184, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_dates_as_pandas_datetime); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 194, __pyx_L1_error)
   if (__pyx_t_1) {
 
-    /* "pyreadstat/pyreadstat.pyx":185
+    /* "pyreadstat/pyreadstat.pyx":195
  *     cdef bint dates_as_pandas = 0
  *     if dates_as_pandas_datetime:
  *         dates_as_pandas = 1             # <<<<<<<<<<<<<<
@@ -3257,7 +3326,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
     __pyx_v_dates_as_pandas = 1;
 
-    /* "pyreadstat/pyreadstat.pyx":184
+    /* "pyreadstat/pyreadstat.pyx":194
  * 
  *     cdef bint dates_as_pandas = 0
  *     if dates_as_pandas_datetime:             # <<<<<<<<<<<<<<
@@ -3266,7 +3335,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
   }
 
-  /* "pyreadstat/pyreadstat.pyx":187
+  /* "pyreadstat/pyreadstat.pyx":197
  *         dates_as_pandas = 1
  * 
  *     cdef bint usernan = 0             # <<<<<<<<<<<<<<
@@ -3275,7 +3344,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
   __pyx_v_usernan = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":189
+  /* "pyreadstat/pyreadstat.pyx":199
  *     cdef bint usernan = 0
  * 
  *     cdef bint no_datetime_conversion = 0             # <<<<<<<<<<<<<<
@@ -3284,17 +3353,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
   __pyx_v_no_datetime_conversion = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":190
+  /* "pyreadstat/pyreadstat.pyx":200
  * 
  *     cdef bint no_datetime_conversion = 0
  *     if disable_datetime_conversion:             # <<<<<<<<<<<<<<
  *         no_datetime_conversion = 1
  * 
  */
-  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_disable_datetime_conversion); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 190, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_disable_datetime_conversion); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 200, __pyx_L1_error)
   if (__pyx_t_1) {
 
-    /* "pyreadstat/pyreadstat.pyx":191
+    /* "pyreadstat/pyreadstat.pyx":201
  *     cdef bint no_datetime_conversion = 0
  *     if disable_datetime_conversion:
  *         no_datetime_conversion = 1             # <<<<<<<<<<<<<<
@@ -3303,7 +3372,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
     __pyx_v_no_datetime_conversion = 1;
 
-    /* "pyreadstat/pyreadstat.pyx":190
+    /* "pyreadstat/pyreadstat.pyx":200
  * 
  *     cdef bint no_datetime_conversion = 0
  *     if disable_datetime_conversion:             # <<<<<<<<<<<<<<
@@ -3312,7 +3381,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
   }
 
-  /* "pyreadstat/pyreadstat.pyx":193
+  /* "pyreadstat/pyreadstat.pyx":203
  *         no_datetime_conversion = 1
  * 
  *     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_SAS             # <<<<<<<<<<<<<<
@@ -3321,14 +3390,14 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  */
   __pyx_v_file_format = __pyx_e_10pyreadstat_16_readstat_parser_FILE_FORMAT_SAS;
 
-  /* "pyreadstat/pyreadstat.pyx":194
+  /* "pyreadstat/pyreadstat.pyx":204
  * 
  *     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_SAS
  *     data_frame, metadata = run_conversion(filename_path, file_format, readstat_parse_xport, encoding, metaonly,             # <<<<<<<<<<<<<<
  *                                           dates_as_pandas, usecols, usernan, no_datetime_conversion, <long>row_limit, <long>row_offset,
- *                                           output_format)
+ *                                           output_format, extra_datetime_formats, extra_date_formats)
  */
-  __pyx_t_2 = __pyx_f_10pyreadstat_16_readstat_parser_run_conversion(__pyx_v_filename_path, __pyx_v_file_format, readstat_parse_xport, __pyx_v_encoding, __pyx_v_metaonly, __pyx_v_dates_as_pandas, __pyx_v_usecols, __pyx_v_usernan, __pyx_v_no_datetime_conversion, ((long)__pyx_v_row_limit), ((long)__pyx_v_row_offset), __pyx_v_output_format); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 194, __pyx_L1_error)
+  __pyx_t_2 = __pyx_f_10pyreadstat_16_readstat_parser_run_conversion(__pyx_v_filename_path, __pyx_v_file_format, readstat_parse_xport, __pyx_v_encoding, __pyx_v_metaonly, __pyx_v_dates_as_pandas, __pyx_v_usecols, __pyx_v_usernan, __pyx_v_no_datetime_conversion, ((long)__pyx_v_row_limit), ((long)__pyx_v_row_offset), __pyx_v_output_format, __pyx_v_extra_datetime_formats, __pyx_v_extra_date_formats); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 204, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_2);
   if ((likely(PyTuple_CheckExact(__pyx_t_2))) || (PyList_CheckExact(__pyx_t_2))) {
     PyObject* sequence = __pyx_t_2;
@@ -3336,7 +3405,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
     if (unlikely(size != 2)) {
       if (size > 2) __Pyx_RaiseTooManyValuesError(2);
       else if (size >= 0) __Pyx_RaiseNeedMoreValuesError(size);
-      __PYX_ERR(0, 194, __pyx_L1_error)
+      __PYX_ERR(0, 204, __pyx_L1_error)
     }
     #if CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS
     if (likely(PyTuple_CheckExact(sequence))) {
@@ -3349,15 +3418,15 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
     __Pyx_INCREF(__pyx_t_3);
     __Pyx_INCREF(__pyx_t_4);
     #else
-    __pyx_t_3 = PySequence_ITEM(sequence, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 194, __pyx_L1_error)
+    __pyx_t_3 = PySequence_ITEM(sequence, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 204, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_3);
-    __pyx_t_4 = PySequence_ITEM(sequence, 1); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 194, __pyx_L1_error)
+    __pyx_t_4 = PySequence_ITEM(sequence, 1); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 204, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_4);
     #endif
     __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
   } else {
     Py_ssize_t index = -1;
-    __pyx_t_5 = PyObject_GetIter(__pyx_t_2); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 194, __pyx_L1_error)
+    __pyx_t_5 = PyObject_GetIter(__pyx_t_2); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 204, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_5);
     __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
     __pyx_t_6 = Py_TYPE(__pyx_t_5)->tp_iternext;
@@ -3365,7 +3434,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
     __Pyx_GOTREF(__pyx_t_3);
     index = 1; __pyx_t_4 = __pyx_t_6(__pyx_t_5); if (unlikely(!__pyx_t_4)) goto __pyx_L6_unpacking_failed;
     __Pyx_GOTREF(__pyx_t_4);
-    if (__Pyx_IternextUnpackEndCheck(__pyx_t_6(__pyx_t_5), 2) < 0) __PYX_ERR(0, 194, __pyx_L1_error)
+    if (__Pyx_IternextUnpackEndCheck(__pyx_t_6(__pyx_t_5), 2) < 0) __PYX_ERR(0, 204, __pyx_L1_error)
     __pyx_t_6 = NULL;
     __Pyx_DECREF(__pyx_t_5); __pyx_t_5 = 0;
     goto __pyx_L7_unpacking_done;
@@ -3373,7 +3442,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
     __Pyx_DECREF(__pyx_t_5); __pyx_t_5 = 0;
     __pyx_t_6 = NULL;
     if (__Pyx_IterFinish() == 0) __Pyx_RaiseNeedMoreValuesError(index);
-    __PYX_ERR(0, 194, __pyx_L1_error)
+    __PYX_ERR(0, 204, __pyx_L1_error)
     __pyx_L7_unpacking_done:;
   }
   __pyx_v_data_frame = __pyx_t_3;
@@ -3381,16 +3450,16 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
   __pyx_v_metadata = __pyx_t_4;
   __pyx_t_4 = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":197
+  /* "pyreadstat/pyreadstat.pyx":207
  *                                           dates_as_pandas, usecols, usernan, no_datetime_conversion, <long>row_limit, <long>row_offset,
- *                                           output_format)
+ *                                           output_format, extra_datetime_formats, extra_date_formats)
  *     metadata.file_format = "xport"             # <<<<<<<<<<<<<<
  * 
  *     return data_frame, metadata
  */
-  if (__Pyx_PyObject_SetAttrStr(__pyx_v_metadata, __pyx_n_s_file_format, __pyx_n_s_xport) < 0) __PYX_ERR(0, 197, __pyx_L1_error)
+  if (__Pyx_PyObject_SetAttrStr(__pyx_v_metadata, __pyx_n_s_file_format, __pyx_n_s_xport) < 0) __PYX_ERR(0, 207, __pyx_L1_error)
 
-  /* "pyreadstat/pyreadstat.pyx":199
+  /* "pyreadstat/pyreadstat.pyx":209
  *     metadata.file_format = "xport"
  * 
  *     return data_frame, metadata             # <<<<<<<<<<<<<<
@@ -3398,7 +3467,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
  * 
  */
   __Pyx_XDECREF(__pyx_r);
-  __pyx_t_2 = PyTuple_New(2); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 199, __pyx_L1_error)
+  __pyx_t_2 = PyTuple_New(2); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 209, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_2);
   __Pyx_INCREF(__pyx_v_data_frame);
   __Pyx_GIVEREF(__pyx_v_data_frame);
@@ -3410,12 +3479,12 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
   __pyx_t_2 = 0;
   goto __pyx_L0;
 
-  /* "pyreadstat/pyreadstat.pyx":134
+  /* "pyreadstat/pyreadstat.pyx":140
  * 
  * 
  * def read_xport(filename_path, metadataonly=False, dates_as_pandas_datetime=False, str encoding=None,             # <<<<<<<<<<<<<<
  *                list usecols=None, disable_datetime_conversion=False, int row_limit=0, int row_offset=0,
- *                str output_format=None):
+ *                str output_format=None, list extra_datetime_formats=None, list extra_date_formats=None):
  */
 
   /* function exit code */
@@ -3434,17 +3503,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_2read_xport(CYTHON_UNUSED Py
   return __pyx_r;
 }
 
-/* "pyreadstat/pyreadstat.pyx":202
+/* "pyreadstat/pyreadstat.pyx":212
  * 
  * 
  * def read_dta(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,             # <<<<<<<<<<<<<<
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
  */
 
 /* Python wrapper */
 static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_5read_dta(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds); /*proto*/
-static char __pyx_doc_10pyreadstat_10pyreadstat_4read_dta[] = "\n    Read a STATA dta file\n\n    Parameters\n    ----------\n        filename_path : str, bytes or Path-like object\n            path to the file. In Python 2.7 the string is assumed to be utf-8 encoded\n        metadataonly : bool, optional\n            by default False. IF true, no data will be read but only metadata, so that you can get all elements in the\n            metadata object. The data frame will be set with the correct column names but no data.\n        dates_as_pandas_datetime : bool, optional\n            by default False. If true dates will be transformed to pandas datetime64 instead of date.\n        apply_value_formats : bool, optional\n            by default False. If true it will change values in the dataframe for they value labels in the metadata,\n            if any appropiate are found.\n        formats_as_category : bool, optional\n            by default True. Takes effect only if apply_value_formats is True. If True, variables with values changed\n            for their formatted version will be transformed into pandas categories.\n        formats_as_ordered_category : bool, optional\n            defaults to False. If True the variables having formats will be transformed into pandas ordered categories.\n            it has precedence over formats_as_category, meaning if this is True, it will take effect irrespective of\n            the value of formats_as_category.\n        encoding : str, optional\n            Defaults to None. If set, the system will use the defined encoding instead of guessing it. It has to be an\n            iconv-compatible name\n        usecols : list, optional\n            a list with column names to read from the file. Only those columns will be imported. Case sensitive!\n        user_missing : bool, optional\n            by default False, in this case user defined missing values are delivered as nan. If true, the missing values\n            will be deliver as is, and an extra piece of information will be set in the ""metadata (missing_user_values)\n            to be able to interpret those values as missing.\n        disable_datetime_conversion : bool, optional\n            if True pyreadstat will not attempt to convert dates, datetimes and times to python objects but those columns\n            will remain as numbers. In order to convert them later to an appropiate python object, the user can use the\n            information about the original variable format stored in the metadata object in original_variable_types.\n            Disabling datetime conversion speeds up reading files. In addition it helps to overcome situations where\n            there are datetimes that are beyond the limits of python datetime (which is limited to year 10,000, dates\n            beyond that will rise an Overflow error in pyreadstat).\n        row_limit : int, optional\n            maximum number of rows to read. The default is 0 meaning unlimited.\n        row_offset : int, optional\n            start reading rows after this offset. By default 0, meaning start with the first row not skipping anything.\n        output_format : str, optional\n            one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the\n            user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas\n            dataframe is avoided.\n\n    Returns\n    -------\n        data_frame : pandas dataframe\n            a pandas data frame with the data. If the output_format is other than 'pandas' the object type will change accordingly.\n        metadata :\n            object with metadata. Look at the documentation for more information.\n    ";
+static char __pyx_doc_10pyreadstat_10pyreadstat_4read_dta[] = "\n    Read a STATA dta file\n\n    Parameters\n    ----------\n        filename_path : str, bytes or Path-like object\n            path to the file. In Python 2.7 the string is assumed to be utf-8 encoded\n        metadataonly : bool, optional\n            by default False. IF true, no data will be read but only metadata, so that you can get all elements in the\n            metadata object. The data frame will be set with the correct column names but no data.\n        dates_as_pandas_datetime : bool, optional\n            by default False. If true dates will be transformed to pandas datetime64 instead of date.\n        apply_value_formats : bool, optional\n            by default False. If true it will change values in the dataframe for they value labels in the metadata,\n            if any appropiate are found.\n        formats_as_category : bool, optional\n            by default True. Takes effect only if apply_value_formats is True. If True, variables with values changed\n            for their formatted version will be transformed into pandas categories.\n        formats_as_ordered_category : bool, optional\n            defaults to False. If True the variables having formats will be transformed into pandas ordered categories.\n            it has precedence over formats_as_category, meaning if this is True, it will take effect irrespective of\n            the value of formats_as_category.\n        encoding : str, optional\n            Defaults to None. If set, the system will use the defined encoding instead of guessing it. It has to be an\n            iconv-compatible name\n        usecols : list, optional\n            a list with column names to read from the file. Only those columns will be imported. Case sensitive!\n        user_missing : bool, optional\n            by default False, in this case user defined missing values are delivered as nan. If true, the missing values\n            will be deliver as is, and an extra piece of information will be set in the ""metadata (missing_user_values)\n            to be able to interpret those values as missing.\n        disable_datetime_conversion : bool, optional\n            if True pyreadstat will not attempt to convert dates, datetimes and times to python objects but those columns\n            will remain as numbers. In order to convert them later to an appropiate python object, the user can use the\n            information about the original variable format stored in the metadata object in original_variable_types.\n            Disabling datetime conversion speeds up reading files. In addition it helps to overcome situations where\n            there are datetimes that are beyond the limits of python datetime (which is limited to year 10,000, dates\n            beyond that will rise an Overflow error in pyreadstat).\n        row_limit : int, optional\n            maximum number of rows to read. The default is 0 meaning unlimited.\n        row_offset : int, optional\n            start reading rows after this offset. By default 0, meaning start with the first row not skipping anything.\n        output_format : str, optional\n            one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the\n            user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas\n            dataframe is avoided.\n        extra_datetime_formats: list of str, optional\n            formats to be parsed as python datetime objects\n        extra_date_formats: list of str, optional\n            formats to be parsed as python date objects\n\n    Returns\n    -------\n        data_frame : pandas dataframe\n            a pandas data frame with the data. If the output_format is other than 'pandas' the object type will change accordingly.\n        metadata :\n            object with metadata. Look at the documentation for more information.\n    ";
 static PyMethodDef __pyx_mdef_10pyreadstat_10pyreadstat_5read_dta = {"read_dta", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_10pyreadstat_10pyreadstat_5read_dta, METH_VARARGS|METH_KEYWORDS, __pyx_doc_10pyreadstat_10pyreadstat_4read_dta};
 static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_5read_dta(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds) {
   PyObject *__pyx_v_filename_path = 0;
@@ -3460,6 +3529,8 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_5read_dta(PyObject *__pyx_se
   int __pyx_v_row_limit;
   int __pyx_v_row_offset;
   PyObject *__pyx_v_output_format = 0;
+  PyObject *__pyx_v_extra_datetime_formats = 0;
+  PyObject *__pyx_v_extra_date_formats = 0;
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
@@ -3467,18 +3538,18 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_5read_dta(PyObject *__pyx_se
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("read_dta (wrapper)", 0);
   {
-    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_filename_path,&__pyx_n_s_metadataonly,&__pyx_n_s_dates_as_pandas_datetime,&__pyx_n_s_apply_value_formats,&__pyx_n_s_formats_as_category,&__pyx_n_s_formats_as_ordered_category,&__pyx_n_s_encoding,&__pyx_n_s_usecols,&__pyx_n_s_user_missing,&__pyx_n_s_disable_datetime_conversion,&__pyx_n_s_row_limit,&__pyx_n_s_row_offset,&__pyx_n_s_output_format,0};
-    PyObject* values[13] = {0,0,0,0,0,0,0,0,0,0,0,0,0};
+    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_filename_path,&__pyx_n_s_metadataonly,&__pyx_n_s_dates_as_pandas_datetime,&__pyx_n_s_apply_value_formats,&__pyx_n_s_formats_as_category,&__pyx_n_s_formats_as_ordered_category,&__pyx_n_s_encoding,&__pyx_n_s_usecols,&__pyx_n_s_user_missing,&__pyx_n_s_disable_datetime_conversion,&__pyx_n_s_row_limit,&__pyx_n_s_row_offset,&__pyx_n_s_output_format,&__pyx_n_s_extra_datetime_formats,&__pyx_n_s_extra_date_formats,0};
+    PyObject* values[15] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
     values[1] = ((PyObject *)Py_False);
     values[2] = ((PyObject *)Py_False);
     values[3] = ((PyObject *)Py_False);
 
-    /* "pyreadstat/pyreadstat.pyx":203
+    /* "pyreadstat/pyreadstat.pyx":213
  * 
  * def read_dta(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,             # <<<<<<<<<<<<<<
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
- *     r"""
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
+ *              list extra_datetime_formats=None, list extra_date_formats=None):
  */
     values[4] = ((PyObject *)Py_True);
     values[5] = ((PyObject *)Py_False);
@@ -3486,19 +3557,33 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_5read_dta(PyObject *__pyx_se
     values[7] = ((PyObject*)Py_None);
     values[8] = ((PyObject *)Py_False);
 
-    /* "pyreadstat/pyreadstat.pyx":204
+    /* "pyreadstat/pyreadstat.pyx":214
  * def read_dta(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):             # <<<<<<<<<<<<<<
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,             # <<<<<<<<<<<<<<
+ *              list extra_datetime_formats=None, list extra_date_formats=None):
  *     r"""
- *     Read a STATA dta file
  */
     values[9] = ((PyObject *)Py_False);
     values[12] = ((PyObject*)Py_None);
+
+    /* "pyreadstat/pyreadstat.pyx":215
+ *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
+ *              list extra_datetime_formats=None, list extra_date_formats=None):             # <<<<<<<<<<<<<<
+ *     r"""
+ *     Read a STATA dta file
+ */
+    values[13] = ((PyObject*)Py_None);
+    values[14] = ((PyObject*)Py_None);
     if (unlikely(__pyx_kwds)) {
       Py_ssize_t kw_args;
       const Py_ssize_t pos_args = PyTuple_GET_SIZE(__pyx_args);
       switch (pos_args) {
+        case 15: values[14] = PyTuple_GET_ITEM(__pyx_args, 14);
+        CYTHON_FALLTHROUGH;
+        case 14: values[13] = PyTuple_GET_ITEM(__pyx_args, 13);
+        CYTHON_FALLTHROUGH;
         case 13: values[12] = PyTuple_GET_ITEM(__pyx_args, 12);
         CYTHON_FALLTHROUGH;
         case 12: values[11] = PyTuple_GET_ITEM(__pyx_args, 11);
@@ -3605,12 +3690,28 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_5read_dta(PyObject *__pyx_se
           PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_output_format);
           if (value) { values[12] = value; kw_args--; }
         }
+        CYTHON_FALLTHROUGH;
+        case 13:
+        if (kw_args > 0) {
+          PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_extra_datetime_formats);
+          if (value) { values[13] = value; kw_args--; }
+        }
+        CYTHON_FALLTHROUGH;
+        case 14:
+        if (kw_args > 0) {
+          PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_extra_date_formats);
+          if (value) { values[14] = value; kw_args--; }
+        }
       }
       if (unlikely(kw_args > 0)) {
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "read_dta") < 0)) __PYX_ERR(0, 202, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "read_dta") < 0)) __PYX_ERR(0, 212, __pyx_L3_error)
       }
     } else {
       switch (PyTuple_GET_SIZE(__pyx_args)) {
+        case 15: values[14] = PyTuple_GET_ITEM(__pyx_args, 14);
+        CYTHON_FALLTHROUGH;
+        case 14: values[13] = PyTuple_GET_ITEM(__pyx_args, 13);
+        CYTHON_FALLTHROUGH;
         case 13: values[12] = PyTuple_GET_ITEM(__pyx_args, 12);
         CYTHON_FALLTHROUGH;
         case 12: values[11] = PyTuple_GET_ITEM(__pyx_args, 11);
@@ -3651,36 +3752,40 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_5read_dta(PyObject *__pyx_se
     __pyx_v_user_missing = values[8];
     __pyx_v_disable_datetime_conversion = values[9];
     if (values[10]) {
-      __pyx_v_row_limit = __Pyx_PyInt_As_int(values[10]); if (unlikely((__pyx_v_row_limit == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 204, __pyx_L3_error)
+      __pyx_v_row_limit = __Pyx_PyInt_As_int(values[10]); if (unlikely((__pyx_v_row_limit == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 214, __pyx_L3_error)
     } else {
       __pyx_v_row_limit = ((int)0);
     }
     if (values[11]) {
-      __pyx_v_row_offset = __Pyx_PyInt_As_int(values[11]); if (unlikely((__pyx_v_row_offset == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 204, __pyx_L3_error)
+      __pyx_v_row_offset = __Pyx_PyInt_As_int(values[11]); if (unlikely((__pyx_v_row_offset == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 214, __pyx_L3_error)
     } else {
       __pyx_v_row_offset = ((int)0);
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     __pyx_v_output_format = ((PyObject*)values[12]);
+    __pyx_v_extra_datetime_formats = ((PyObject*)values[13]);
+    __pyx_v_extra_date_formats = ((PyObject*)values[14]);
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+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_encoding), (&PyString_Type), 1, "encoding", 1))) __PYX_ERR(0, 213, __pyx_L1_error)
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@@ -3722,17 +3827,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_4read_dta(CYTHON_UNUSED PyOb
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-    __pyx_t_3 = __Pyx_PyDict_NewPresized(2); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 283, __pyx_L1_error)
+    __pyx_t_3 = __Pyx_PyDict_NewPresized(2); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 298, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_3);
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+    if (PyDict_SetItem(__pyx_t_3, __pyx_n_s_formats_as_category, __pyx_v_formats_as_category) < 0) __PYX_ERR(0, 298, __pyx_L1_error)
 
-    /* "pyreadstat/pyreadstat.pyx":284
+    /* "pyreadstat/pyreadstat.pyx":299
  *     if apply_value_formats:
  *         data_frame = set_value_labels(data_frame, metadata, formats_as_category=formats_as_category,
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-    if (PyDict_SetItem(__pyx_t_3, __pyx_n_s_formats_as_ordered_category, __pyx_v_formats_as_ordered_category) < 0) __PYX_ERR(0, 283, __pyx_L1_error)
+    if (PyDict_SetItem(__pyx_t_3, __pyx_n_s_formats_as_ordered_category, __pyx_v_formats_as_ordered_category) < 0) __PYX_ERR(0, 298, __pyx_L1_error)
 
-    /* "pyreadstat/pyreadstat.pyx":283
+    /* "pyreadstat/pyreadstat.pyx":298
  * 
  *     if apply_value_formats:
  *         data_frame = set_value_labels(data_frame, metadata, formats_as_category=formats_as_category,             # <<<<<<<<<<<<<<
  *                                       formats_as_ordered_category=formats_as_ordered_category)
  * 
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-    __pyx_t_5 = __Pyx_PyObject_Call(__pyx_t_2, __pyx_t_4, __pyx_t_3); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 283, __pyx_L1_error)
+    __pyx_t_5 = __Pyx_PyObject_Call(__pyx_t_2, __pyx_t_4, __pyx_t_3); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 298, __pyx_L1_error)
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@@ -3994,7 +4099,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_4read_dta(CYTHON_UNUSED PyOb
     __Pyx_DECREF_SET(__pyx_v_data_frame, __pyx_t_5);
     __pyx_t_5 = 0;
 
-    /* "pyreadstat/pyreadstat.pyx":282
+    /* "pyreadstat/pyreadstat.pyx":297
  *     metadata.file_format = "dta"
  * 
  *     if apply_value_formats:             # <<<<<<<<<<<<<<
@@ -4003,7 +4108,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_4read_dta(CYTHON_UNUSED PyOb
  */
   }
 
-  /* "pyreadstat/pyreadstat.pyx":286
+  /* "pyreadstat/pyreadstat.pyx":301
  *                                       formats_as_ordered_category=formats_as_ordered_category)
  * 
  *     return data_frame, metadata             # <<<<<<<<<<<<<<
@@ -4011,7 +4116,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_4read_dta(CYTHON_UNUSED PyOb
  * 
  */
   __Pyx_XDECREF(__pyx_r);
-  __pyx_t_5 = PyTuple_New(2); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 286, __pyx_L1_error)
+  __pyx_t_5 = PyTuple_New(2); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 301, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_5);
   __Pyx_INCREF(__pyx_v_data_frame);
   __Pyx_GIVEREF(__pyx_v_data_frame);
@@ -4023,12 +4128,12 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_4read_dta(CYTHON_UNUSED PyOb
   __pyx_t_5 = 0;
   goto __pyx_L0;
 
-  /* "pyreadstat/pyreadstat.pyx":202
+  /* "pyreadstat/pyreadstat.pyx":212
  * 
  * 
  * def read_dta(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,             # <<<<<<<<<<<<<<
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
  */
 
   /* function exit code */
@@ -4047,17 +4152,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_4read_dta(CYTHON_UNUSED PyOb
   return __pyx_r;
 }
 
-/* "pyreadstat/pyreadstat.pyx":289
+/* "pyreadstat/pyreadstat.pyx":304
  * 
  * 
  * def read_sav(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,             # <<<<<<<<<<<<<<
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None, list extra_datetime_formats=None,
  */
 
 /* Python wrapper */
 static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_7read_sav(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds); /*proto*/
-static char __pyx_doc_10pyreadstat_10pyreadstat_6read_sav[] = "\n    Read a SPSS sav or zsav (compressed) files\n\n    Parameters\n    ----------\n        filename_path : str, bytes or Path-like object\n            path to the file. In Python 2.7 the string is assumed to be utf-8 encoded\n        metadataonly : bool, optional\n            by default False. IF true, no data will be read but only metadata, so that you can get all elements in the\n            metadata object. The data frame will be set with the correct column names but no data.\n        dates_as_pandas_datetime : bool, optional\n            by default False. If true dates will be transformed to pandas datetime64 instead of date.\n        apply_value_formats : bool, optional\n            by default False. If true it will change values in the dataframe for they value labels in the metadata,\n            if any appropiate are found.\n        formats_as_category : bool, optional\n            by default True. Takes effect only if apply_value_formats is True. If True, variables with values changed\n            for their formatted version will be transformed into pandas categories.\n        formats_as_ordered_category : bool, optional\n            defaults to False. If True the variables having formats will be transformed into pandas ordered categories.\n            it has precedence over formats_as_category, meaning if this is True, it will take effect irrespective of\n            the value of formats_as_category.\n        encoding : str, optional\n            Defaults to None. If set, the system will use the defined encoding instead of guessing it. It has to be an\n            iconv-compatible name\n        usecols : list, optional\n            a list with column names to read from the file. Only those columns will be imported. Case sensitive!\n        user_missing : bool, optional\n            by default False, in this case user defined missing values are delivered as nan. If true, the missing values\n            will be deliver as is, and an extra piece of informatio""n will be set in the metadata (missing_ranges)\n            to be able to interpret those values as missing.\n        disable_datetime_conversion : bool, optional\n            if True pyreadstat will not attempt to convert dates, datetimes and times to python objects but those columns\n            will remain as numbers. In order to convert them later to an appropiate python object, the user can use the\n            information about the original variable format stored in the metadata object in original_variable_types.\n            Disabling datetime conversion speeds up reading files. In addition it helps to overcome situations where\n            there are datetimes that are beyond the limits of python datetime (which is limited to year 10,000, dates\n            beyond that will rise an Overflow error in pyreadstat).\n        row_limit : int, optional\n            maximum number of rows to read. The default is 0 meaning unlimited.\n        row_offset : int, optional\n            start reading rows after this offset. By default 0, meaning start with the first row not skipping anything.\n        output_format : str, optional\n            one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the\n            user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas\n            dataframe is avoided.\n\n    Returns\n    -------\n        data_frame : pandas dataframe\n            a pandas data frame with the data. If the output_format is other than 'pandas' the object type will change accordingly.\n        metadata :\n            object with metadata. Look at the documentation for more information.\n    ";
+static char __pyx_doc_10pyreadstat_10pyreadstat_6read_sav[] = "\n    Read a SPSS sav or zsav (compressed) files\n\n    Parameters\n    ----------\n        filename_path : str, bytes or Path-like object\n            path to the file. In Python 2.7 the string is assumed to be utf-8 encoded\n        metadataonly : bool, optional\n            by default False. IF true, no data will be read but only metadata, so that you can get all elements in the\n            metadata object. The data frame will be set with the correct column names but no data.\n        dates_as_pandas_datetime : bool, optional\n            by default False. If true dates will be transformed to pandas datetime64 instead of date.\n        apply_value_formats : bool, optional\n            by default False. If true it will change values in the dataframe for they value labels in the metadata,\n            if any appropiate are found.\n        formats_as_category : bool, optional\n            by default True. Takes effect only if apply_value_formats is True. If True, variables with values changed\n            for their formatted version will be transformed into pandas categories.\n        formats_as_ordered_category : bool, optional\n            defaults to False. If True the variables having formats will be transformed into pandas ordered categories.\n            it has precedence over formats_as_category, meaning if this is True, it will take effect irrespective of\n            the value of formats_as_category.\n        encoding : str, optional\n            Defaults to None. If set, the system will use the defined encoding instead of guessing it. It has to be an\n            iconv-compatible name\n        usecols : list, optional\n            a list with column names to read from the file. Only those columns will be imported. Case sensitive!\n        user_missing : bool, optional\n            by default False, in this case user defined missing values are delivered as nan. If true, the missing values\n            will be deliver as is, and an extra piece of informatio""n will be set in the metadata (missing_ranges)\n            to be able to interpret those values as missing.\n        disable_datetime_conversion : bool, optional\n            if True pyreadstat will not attempt to convert dates, datetimes and times to python objects but those columns\n            will remain as numbers. In order to convert them later to an appropiate python object, the user can use the\n            information about the original variable format stored in the metadata object in original_variable_types.\n            Disabling datetime conversion speeds up reading files. In addition it helps to overcome situations where\n            there are datetimes that are beyond the limits of python datetime (which is limited to year 10,000, dates\n            beyond that will rise an Overflow error in pyreadstat).\n        row_limit : int, optional\n            maximum number of rows to read. The default is 0 meaning unlimited.\n        row_offset : int, optional\n            start reading rows after this offset. By default 0, meaning start with the first row not skipping anything.\n        output_format : str, optional\n            one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the\n            user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas\n            dataframe is avoided.\n        extra_datetime_formats: list of str, optional\n            formats to be parsed as python datetime objects\n        extra_date_formats: list of str, optional\n            formats to be parsed as python date objects\n\n    Returns\n    -------\n        data_frame : pandas dataframe\n            a pandas data frame with the data. If the output_format is other than 'pandas' the object type will change accordingly.\n        metadata :\n            object with metadata. Look at the documentation for more information.\n    ";
 static PyMethodDef __pyx_mdef_10pyreadstat_10pyreadstat_7read_sav = {"read_sav", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_10pyreadstat_10pyreadstat_7read_sav, METH_VARARGS|METH_KEYWORDS, __pyx_doc_10pyreadstat_10pyreadstat_6read_sav};
 static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_7read_sav(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds) {
   PyObject *__pyx_v_filename_path = 0;
@@ -4073,6 +4178,8 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_7read_sav(PyObject *__pyx_se
   int __pyx_v_row_limit;
   int __pyx_v_row_offset;
   PyObject *__pyx_v_output_format = 0;
+  PyObject *__pyx_v_extra_datetime_formats = 0;
+  PyObject *__pyx_v_extra_date_formats = 0;
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
@@ -4080,18 +4187,18 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_7read_sav(PyObject *__pyx_se
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("read_sav (wrapper)", 0);
   {
-    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_filename_path,&__pyx_n_s_metadataonly,&__pyx_n_s_dates_as_pandas_datetime,&__pyx_n_s_apply_value_formats,&__pyx_n_s_formats_as_category,&__pyx_n_s_formats_as_ordered_category,&__pyx_n_s_encoding,&__pyx_n_s_usecols,&__pyx_n_s_user_missing,&__pyx_n_s_disable_datetime_conversion,&__pyx_n_s_row_limit,&__pyx_n_s_row_offset,&__pyx_n_s_output_format,0};
-    PyObject* values[13] = {0,0,0,0,0,0,0,0,0,0,0,0,0};
+    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_filename_path,&__pyx_n_s_metadataonly,&__pyx_n_s_dates_as_pandas_datetime,&__pyx_n_s_apply_value_formats,&__pyx_n_s_formats_as_category,&__pyx_n_s_formats_as_ordered_category,&__pyx_n_s_encoding,&__pyx_n_s_usecols,&__pyx_n_s_user_missing,&__pyx_n_s_disable_datetime_conversion,&__pyx_n_s_row_limit,&__pyx_n_s_row_offset,&__pyx_n_s_output_format,&__pyx_n_s_extra_datetime_formats,&__pyx_n_s_extra_date_formats,0};
+    PyObject* values[15] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
     values[1] = ((PyObject *)Py_False);
     values[2] = ((PyObject *)Py_False);
     values[3] = ((PyObject *)Py_False);
 
-    /* "pyreadstat/pyreadstat.pyx":290
+    /* "pyreadstat/pyreadstat.pyx":305
  * 
  * def read_sav(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,             # <<<<<<<<<<<<<<
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
- *     r"""
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None, list extra_datetime_formats=None,
+ *              list extra_date_formats=None):
  */
     values[4] = ((PyObject *)Py_True);
     values[5] = ((PyObject *)Py_False);
@@ -4099,19 +4206,33 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_7read_sav(PyObject *__pyx_se
     values[7] = ((PyObject*)Py_None);
     values[8] = ((PyObject *)Py_False);
 
-    /* "pyreadstat/pyreadstat.pyx":291
+    /* "pyreadstat/pyreadstat.pyx":306
  * def read_sav(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):             # <<<<<<<<<<<<<<
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None, list extra_datetime_formats=None,             # <<<<<<<<<<<<<<
+ *              list extra_date_formats=None):
  *     r"""
- *     Read a SPSS sav or zsav (compressed) files
  */
     values[9] = ((PyObject *)Py_False);
     values[12] = ((PyObject*)Py_None);
+    values[13] = ((PyObject*)Py_None);
+
+    /* "pyreadstat/pyreadstat.pyx":307
+ *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None, list extra_datetime_formats=None,
+ *              list extra_date_formats=None):             # <<<<<<<<<<<<<<
+ *     r"""
+ *     Read a SPSS sav or zsav (compressed) files
+ */
+    values[14] = ((PyObject*)Py_None);
     if (unlikely(__pyx_kwds)) {
       Py_ssize_t kw_args;
       const Py_ssize_t pos_args = PyTuple_GET_SIZE(__pyx_args);
       switch (pos_args) {
+        case 15: values[14] = PyTuple_GET_ITEM(__pyx_args, 14);
+        CYTHON_FALLTHROUGH;
+        case 14: values[13] = PyTuple_GET_ITEM(__pyx_args, 13);
+        CYTHON_FALLTHROUGH;
         case 13: values[12] = PyTuple_GET_ITEM(__pyx_args, 12);
         CYTHON_FALLTHROUGH;
         case 12: values[11] = PyTuple_GET_ITEM(__pyx_args, 11);
@@ -4218,12 +4339,28 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_7read_sav(PyObject *__pyx_se
           PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_output_format);
           if (value) { values[12] = value; kw_args--; }
         }
+        CYTHON_FALLTHROUGH;
+        case 13:
+        if (kw_args > 0) {
+          PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_extra_datetime_formats);
+          if (value) { values[13] = value; kw_args--; }
+        }
+        CYTHON_FALLTHROUGH;
+        case 14:
+        if (kw_args > 0) {
+          PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_extra_date_formats);
+          if (value) { values[14] = value; kw_args--; }
+        }
       }
       if (unlikely(kw_args > 0)) {
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "read_sav") < 0)) __PYX_ERR(0, 289, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "read_sav") < 0)) __PYX_ERR(0, 304, __pyx_L3_error)
       }
     } else {
       switch (PyTuple_GET_SIZE(__pyx_args)) {
+        case 15: values[14] = PyTuple_GET_ITEM(__pyx_args, 14);
+        CYTHON_FALLTHROUGH;
+        case 14: values[13] = PyTuple_GET_ITEM(__pyx_args, 13);
+        CYTHON_FALLTHROUGH;
         case 13: values[12] = PyTuple_GET_ITEM(__pyx_args, 12);
         CYTHON_FALLTHROUGH;
         case 12: values[11] = PyTuple_GET_ITEM(__pyx_args, 11);
@@ -4264,36 +4401,40 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_7read_sav(PyObject *__pyx_se
     __pyx_v_user_missing = values[8];
     __pyx_v_disable_datetime_conversion = values[9];
     if (values[10]) {
-      __pyx_v_row_limit = __Pyx_PyInt_As_int(values[10]); if (unlikely((__pyx_v_row_limit == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 291, __pyx_L3_error)
+      __pyx_v_row_limit = __Pyx_PyInt_As_int(values[10]); if (unlikely((__pyx_v_row_limit == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 306, __pyx_L3_error)
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+      __pyx_v_row_offset = __Pyx_PyInt_As_int(values[11]); if (unlikely((__pyx_v_row_offset == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 306, __pyx_L3_error)
     } else {
       __pyx_v_row_offset = ((int)0);
     }
     __pyx_v_output_format = ((PyObject*)values[12]);
+    __pyx_v_extra_datetime_formats = ((PyObject*)values[13]);
+    __pyx_v_extra_date_formats = ((PyObject*)values[14]);
   }
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L5_argtuple_error:;
-  __Pyx_RaiseArgtupleInvalid("read_sav", 0, 1, 13, PyTuple_GET_SIZE(__pyx_args)); __PYX_ERR(0, 289, __pyx_L3_error)
+  __Pyx_RaiseArgtupleInvalid("read_sav", 0, 1, 15, PyTuple_GET_SIZE(__pyx_args)); __PYX_ERR(0, 304, __pyx_L3_error)
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-  __pyx_r = __pyx_pf_10pyreadstat_10pyreadstat_6read_sav(__pyx_self, __pyx_v_filename_path, __pyx_v_metadataonly, __pyx_v_dates_as_pandas_datetime, __pyx_v_apply_value_formats, __pyx_v_formats_as_category, __pyx_v_formats_as_ordered_category, __pyx_v_encoding, __pyx_v_usecols, __pyx_v_user_missing, __pyx_v_disable_datetime_conversion, __pyx_v_row_limit, __pyx_v_row_offset, __pyx_v_output_format);
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_encoding), (&PyString_Type), 1, "encoding", 1))) __PYX_ERR(0, 305, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_usecols), (&PyList_Type), 1, "usecols", 1))) __PYX_ERR(0, 305, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_output_format), (&PyString_Type), 1, "output_format", 1))) __PYX_ERR(0, 306, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_extra_datetime_formats), (&PyList_Type), 1, "extra_datetime_formats", 1))) __PYX_ERR(0, 306, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_extra_date_formats), (&PyList_Type), 1, "extra_date_formats", 1))) __PYX_ERR(0, 307, __pyx_L1_error)
+  __pyx_r = __pyx_pf_10pyreadstat_10pyreadstat_6read_sav(__pyx_self, __pyx_v_filename_path, __pyx_v_metadataonly, __pyx_v_dates_as_pandas_datetime, __pyx_v_apply_value_formats, __pyx_v_formats_as_category, __pyx_v_formats_as_ordered_category, __pyx_v_encoding, __pyx_v_usecols, __pyx_v_user_missing, __pyx_v_disable_datetime_conversion, __pyx_v_row_limit, __pyx_v_row_offset, __pyx_v_output_format, __pyx_v_extra_datetime_formats, __pyx_v_extra_date_formats);
 
-  /* "pyreadstat/pyreadstat.pyx":289
+  /* "pyreadstat/pyreadstat.pyx":304
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  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None, list extra_datetime_formats=None,
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   /* function exit code */
@@ -4305,7 +4446,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_7read_sav(PyObject *__pyx_se
   return __pyx_r;
 }
 
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+static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_apply_value_formats, PyObject *__pyx_v_formats_as_category, PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_user_missing, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format, PyObject *__pyx_v_extra_datetime_formats, PyObject *__pyx_v_extra_date_formats) {
   int __pyx_v_metaonly;
   int __pyx_v_dates_as_pandas;
   int __pyx_v_usernan;
@@ -4326,7 +4467,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("read_sav", 0);
 
-  /* "pyreadstat/pyreadstat.pyx":347
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@@ -4335,17 +4476,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
  */
   __pyx_v_metaonly = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":348
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-  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_metadataonly); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 348, __pyx_L1_error)
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-    /* "pyreadstat/pyreadstat.pyx":349
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-    /* "pyreadstat/pyreadstat.pyx":348
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@@ -4363,7 +4504,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
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-  /* "pyreadstat/pyreadstat.pyx":351
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@@ -4372,17 +4513,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
  */
   __pyx_v_dates_as_pandas = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":352
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+  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_dates_as_pandas_datetime); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 372, __pyx_L1_error)
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-    /* "pyreadstat/pyreadstat.pyx":353
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@@ -4391,7 +4532,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
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-    /* "pyreadstat/pyreadstat.pyx":352
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-  /* "pyreadstat/pyreadstat.pyx":355
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-    /* "pyreadstat/pyreadstat.pyx":356
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+  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_disable_datetime_conversion); if (unlikely(__pyx_t_1 < 0)) __PYX_ERR(0, 380, __pyx_L1_error)
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-    /* "pyreadstat/pyreadstat.pyx":361
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     __pyx_v_no_datetime_conversion = 1;
 
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+    /* "pyreadstat/pyreadstat.pyx":380
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-  /* "pyreadstat/pyreadstat.pyx":363
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-  /* "pyreadstat/pyreadstat.pyx":364
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+  __pyx_t_2 = __pyx_f_10pyreadstat_16_readstat_parser_run_conversion(__pyx_v_filename_path, __pyx_v_file_format, readstat_parse_sav, __pyx_v_encoding, __pyx_v_metaonly, __pyx_v_dates_as_pandas, __pyx_v_usecols, __pyx_v_usernan, __pyx_v_no_datetime_conversion, ((long)__pyx_v_row_limit), ((long)__pyx_v_row_offset), __pyx_v_output_format, __pyx_v_extra_datetime_formats, __pyx_v_extra_date_formats); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 384, __pyx_L1_error)
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@@ -4498,7 +4639,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
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@@ -4527,7 +4668,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
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-  /* "pyreadstat/pyreadstat.pyx":367
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-  /* "pyreadstat/pyreadstat.pyx":369
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-    /* "pyreadstat/pyreadstat.pyx":370
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-    __pyx_t_4 = PyTuple_New(2); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 370, __pyx_L1_error)
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@@ -4579,27 +4720,27 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
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-    __pyx_t_3 = __Pyx_PyDict_NewPresized(2); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 370, __pyx_L1_error)
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@@ -4607,7 +4748,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
     __Pyx_DECREF_SET(__pyx_v_data_frame, __pyx_t_5);
     __pyx_t_5 = 0;
 
-    /* "pyreadstat/pyreadstat.pyx":369
+    /* "pyreadstat/pyreadstat.pyx":389
  *     metadata.file_format = "sav/zsav"
  * 
  *     if apply_value_formats:             # <<<<<<<<<<<<<<
@@ -4616,7 +4757,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
  */
   }
 
-  /* "pyreadstat/pyreadstat.pyx":373
+  /* "pyreadstat/pyreadstat.pyx":393
  *                                       formats_as_ordered_category=formats_as_ordered_category)
  * 
  *     return data_frame, metadata             # <<<<<<<<<<<<<<
@@ -4624,7 +4765,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
  * 
  */
   __Pyx_XDECREF(__pyx_r);
-  __pyx_t_5 = PyTuple_New(2); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 373, __pyx_L1_error)
+  __pyx_t_5 = PyTuple_New(2); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 393, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_5);
   __Pyx_INCREF(__pyx_v_data_frame);
   __Pyx_GIVEREF(__pyx_v_data_frame);
@@ -4636,12 +4777,12 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
   __pyx_t_5 = 0;
   goto __pyx_L0;
 
-  /* "pyreadstat/pyreadstat.pyx":289
+  /* "pyreadstat/pyreadstat.pyx":304
  * 
  * 
  * def read_sav(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,             # <<<<<<<<<<<<<<
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None, list extra_datetime_formats=None,
  */
 
   /* function exit code */
@@ -4660,17 +4801,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_6read_sav(CYTHON_UNUSED PyOb
   return __pyx_r;
 }
 
-/* "pyreadstat/pyreadstat.pyx":376
+/* "pyreadstat/pyreadstat.pyx":396
  * 
  * 
  * def read_por(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,             # <<<<<<<<<<<<<<
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
  */
 
 /* Python wrapper */
 static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_9read_por(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds); /*proto*/
-static char __pyx_doc_10pyreadstat_10pyreadstat_8read_por[] = "\n    Read a SPSS por file\n\n    Parameters\n    ----------\n        filename_path : str, bytes or Path-like object\n            path to the file. In Python 2.7 the string is assumed to be utf-8 encoded\n        metadataonly : bool, optional\n            by default False. IF true, no data will be read but only metadata, so that you can get all elements in the\n            metadata object. The data frame will be set with the correct column names but no data.\n            Notice that number_rows will be None as por files do not have the number of rows recorded in the file metadata.\n        dates_as_pandas_datetime : bool, optional\n            by default False. If true dates will be transformed to pandas datetime64 instead of date.\n        apply_value_formats : bool, optional\n            by default False. If true it will change values in the dataframe for they value labels in the metadata,\n            if any appropiate are found.\n        formats_as_category : bool, optional\n            by default True. Takes effect only if apply_value_formats is True. If True, variables with values changed\n            for their formatted version will be transformed into pandas categories.\n        formats_as_ordered_category : bool, optional\n            defaults to False. If True the variables having formats will be transformed into pandas ordered categories.\n            it has precedence over formats_as_category, meaning if this is True, it will take effect irrespective of\n            the value of formats_as_category.\n        encoding : str, optional\n            Defaults to None. If set, the system will use the defined encoding instead of guessing it. It has to be an\n            iconv-compatible name\n        usecols : list, optional\n            a list with column names to read from the file. Only those columns will be imported. Case sensitive!\n        disable_datetime_conversion : bool, optional\n            if True pyreadstat will not attempt to convert dates, datet""imes and times to python objects but those columns\n            will remain as numbers. In order to convert them later to an appropiate python object, the user can use the\n            information about the original variable format stored in the metadata object in original_variable_types.\n            Disabling datetime conversion speeds up reading files. In addition it helps to overcome situations where\n            there are datetimes that are beyond the limits of python datetime (which is limited to year 10,000, dates\n            beyond that will rise an Overflow error in pyreadstat).\n        row_limit : int, optional\n            maximum number of rows to read. The default is 0 meaning unlimited.\n        row_offset : int, optional\n            start reading rows after this offset. By default 0, meaning start with the first row not skipping anything.\n        output_format : str, optional\n            one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the\n            user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas\n            dataframe is avoided.\n\n    Returns\n    -------\n        data_frame : pandas dataframe\n            a pandas data frame with the data. If the output_format is other than 'pandas' the object type will change accordingly.\n        metadata :\n            object with metadata. Look at the documentation for more information.\n    ";
+static char __pyx_doc_10pyreadstat_10pyreadstat_8read_por[] = "\n    Read a SPSS por file\n\n    Parameters\n    ----------\n        filename_path : str, bytes or Path-like object\n            path to the file. In Python 2.7 the string is assumed to be utf-8 encoded\n        metadataonly : bool, optional\n            by default False. IF true, no data will be read but only metadata, so that you can get all elements in the\n            metadata object. The data frame will be set with the correct column names but no data.\n            Notice that number_rows will be None as por files do not have the number of rows recorded in the file metadata.\n        dates_as_pandas_datetime : bool, optional\n            by default False. If true dates will be transformed to pandas datetime64 instead of date.\n        apply_value_formats : bool, optional\n            by default False. If true it will change values in the dataframe for they value labels in the metadata,\n            if any appropiate are found.\n        formats_as_category : bool, optional\n            by default True. Takes effect only if apply_value_formats is True. If True, variables with values changed\n            for their formatted version will be transformed into pandas categories.\n        formats_as_ordered_category : bool, optional\n            defaults to False. If True the variables having formats will be transformed into pandas ordered categories.\n            it has precedence over formats_as_category, meaning if this is True, it will take effect irrespective of\n            the value of formats_as_category.\n        encoding : str, optional\n            Defaults to None. If set, the system will use the defined encoding instead of guessing it. It has to be an\n            iconv-compatible name\n        usecols : list, optional\n            a list with column names to read from the file. Only those columns will be imported. Case sensitive!\n        disable_datetime_conversion : bool, optional\n            if True pyreadstat will not attempt to convert dates, datet""imes and times to python objects but those columns\n            will remain as numbers. In order to convert them later to an appropiate python object, the user can use the\n            information about the original variable format stored in the metadata object in original_variable_types.\n            Disabling datetime conversion speeds up reading files. In addition it helps to overcome situations where\n            there are datetimes that are beyond the limits of python datetime (which is limited to year 10,000, dates\n            beyond that will rise an Overflow error in pyreadstat).\n        row_limit : int, optional\n            maximum number of rows to read. The default is 0 meaning unlimited.\n        row_offset : int, optional\n            start reading rows after this offset. By default 0, meaning start with the first row not skipping anything.\n        output_format : str, optional\n            one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the\n            user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas\n            dataframe is avoided.\n        extra_datetime_formats: list of str, optional\n            formats to be parsed as python datetime objects\n        extra_date_formats: list of str, optional\n            formats to be parsed as python date objects\n\n    Returns\n    -------\n        data_frame : pandas dataframe\n            a pandas data frame with the data. If the output_format is other than 'pandas' the object type will change accordingly.\n        metadata :\n            object with metadata. Look at the documentation for more information.\n    ";
 static PyMethodDef __pyx_mdef_10pyreadstat_10pyreadstat_9read_por = {"read_por", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_10pyreadstat_10pyreadstat_9read_por, METH_VARARGS|METH_KEYWORDS, __pyx_doc_10pyreadstat_10pyreadstat_8read_por};
 static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_9read_por(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds) {
   PyObject *__pyx_v_filename_path = 0;
@@ -4685,6 +4826,8 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_9read_por(PyObject *__pyx_se
   int __pyx_v_row_limit;
   int __pyx_v_row_offset;
   PyObject *__pyx_v_output_format = 0;
+  PyObject *__pyx_v_extra_datetime_formats = 0;
+  PyObject *__pyx_v_extra_date_formats = 0;
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
@@ -4692,37 +4835,51 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_9read_por(PyObject *__pyx_se
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("read_por (wrapper)", 0);
   {
-    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_filename_path,&__pyx_n_s_metadataonly,&__pyx_n_s_dates_as_pandas_datetime,&__pyx_n_s_apply_value_formats,&__pyx_n_s_formats_as_category,&__pyx_n_s_formats_as_ordered_category,&__pyx_n_s_encoding,&__pyx_n_s_usecols,&__pyx_n_s_disable_datetime_conversion,&__pyx_n_s_row_limit,&__pyx_n_s_row_offset,&__pyx_n_s_output_format,0};
-    PyObject* values[12] = {0,0,0,0,0,0,0,0,0,0,0,0};
+    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_filename_path,&__pyx_n_s_metadataonly,&__pyx_n_s_dates_as_pandas_datetime,&__pyx_n_s_apply_value_formats,&__pyx_n_s_formats_as_category,&__pyx_n_s_formats_as_ordered_category,&__pyx_n_s_encoding,&__pyx_n_s_usecols,&__pyx_n_s_disable_datetime_conversion,&__pyx_n_s_row_limit,&__pyx_n_s_row_offset,&__pyx_n_s_output_format,&__pyx_n_s_extra_datetime_formats,&__pyx_n_s_extra_date_formats,0};
+    PyObject* values[14] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0};
     values[1] = ((PyObject *)Py_False);
     values[2] = ((PyObject *)Py_False);
     values[3] = ((PyObject *)Py_False);
 
-    /* "pyreadstat/pyreadstat.pyx":377
+    /* "pyreadstat/pyreadstat.pyx":397
  * 
  * def read_por(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None,             # <<<<<<<<<<<<<<
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
- *     r"""
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
+ *              list extra_datetime_formats=None, list extra_date_formats=None):
  */
     values[4] = ((PyObject *)Py_True);
     values[5] = ((PyObject *)Py_False);
     values[6] = ((PyObject*)Py_None);
     values[7] = ((PyObject*)Py_None);
 
-    /* "pyreadstat/pyreadstat.pyx":378
+    /* "pyreadstat/pyreadstat.pyx":398
  * def read_por(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):             # <<<<<<<<<<<<<<
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,             # <<<<<<<<<<<<<<
+ *              list extra_datetime_formats=None, list extra_date_formats=None):
  *     r"""
- *     Read a SPSS por file
  */
     values[8] = ((PyObject *)Py_False);
     values[11] = ((PyObject*)Py_None);
+
+    /* "pyreadstat/pyreadstat.pyx":399
+ *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None,
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
+ *              list extra_datetime_formats=None, list extra_date_formats=None):             # <<<<<<<<<<<<<<
+ *     r"""
+ *     Read a SPSS por file
+ */
+    values[12] = ((PyObject*)Py_None);
+    values[13] = ((PyObject*)Py_None);
     if (unlikely(__pyx_kwds)) {
       Py_ssize_t kw_args;
       const Py_ssize_t pos_args = PyTuple_GET_SIZE(__pyx_args);
       switch (pos_args) {
+        case 14: values[13] = PyTuple_GET_ITEM(__pyx_args, 13);
+        CYTHON_FALLTHROUGH;
+        case 13: values[12] = PyTuple_GET_ITEM(__pyx_args, 12);
+        CYTHON_FALLTHROUGH;
         case 12: values[11] = PyTuple_GET_ITEM(__pyx_args, 11);
         CYTHON_FALLTHROUGH;
         case 11: values[10] = PyTuple_GET_ITEM(__pyx_args, 10);
@@ -4821,12 +4978,28 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_9read_por(PyObject *__pyx_se
           PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_output_format);
           if (value) { values[11] = value; kw_args--; }
         }
+        CYTHON_FALLTHROUGH;
+        case 12:
+        if (kw_args > 0) {
+          PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_extra_datetime_formats);
+          if (value) { values[12] = value; kw_args--; }
+        }
+        CYTHON_FALLTHROUGH;
+        case 13:
+        if (kw_args > 0) {
+          PyObject* value = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_extra_date_formats);
+          if (value) { values[13] = value; kw_args--; }
+        }
       }
       if (unlikely(kw_args > 0)) {
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "read_por") < 0)) __PYX_ERR(0, 376, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "read_por") < 0)) __PYX_ERR(0, 396, __pyx_L3_error)
       }
     } else {
       switch (PyTuple_GET_SIZE(__pyx_args)) {
+        case 14: values[13] = PyTuple_GET_ITEM(__pyx_args, 13);
+        CYTHON_FALLTHROUGH;
+        case 13: values[12] = PyTuple_GET_ITEM(__pyx_args, 12);
+        CYTHON_FALLTHROUGH;
         case 12: values[11] = PyTuple_GET_ITEM(__pyx_args, 11);
         CYTHON_FALLTHROUGH;
         case 11: values[10] = PyTuple_GET_ITEM(__pyx_args, 10);
@@ -4864,36 +5037,40 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_9read_por(PyObject *__pyx_se
     __pyx_v_usecols = ((PyObject*)values[7]);
     __pyx_v_disable_datetime_conversion = values[8];
     if (values[9]) {
-      __pyx_v_row_limit = __Pyx_PyInt_As_int(values[9]); if (unlikely((__pyx_v_row_limit == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 378, __pyx_L3_error)
+      __pyx_v_row_limit = __Pyx_PyInt_As_int(values[9]); if (unlikely((__pyx_v_row_limit == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 398, __pyx_L3_error)
     } else {
       __pyx_v_row_limit = ((int)0);
     }
     if (values[10]) {
-      __pyx_v_row_offset = __Pyx_PyInt_As_int(values[10]); if (unlikely((__pyx_v_row_offset == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 378, __pyx_L3_error)
+      __pyx_v_row_offset = __Pyx_PyInt_As_int(values[10]); if (unlikely((__pyx_v_row_offset == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 398, __pyx_L3_error)
     } else {
       __pyx_v_row_offset = ((int)0);
     }
     __pyx_v_output_format = ((PyObject*)values[11]);
+    __pyx_v_extra_datetime_formats = ((PyObject*)values[12]);
+    __pyx_v_extra_date_formats = ((PyObject*)values[13]);
   }
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L5_argtuple_error:;
-  __Pyx_RaiseArgtupleInvalid("read_por", 0, 1, 12, PyTuple_GET_SIZE(__pyx_args)); __PYX_ERR(0, 376, __pyx_L3_error)
+  __Pyx_RaiseArgtupleInvalid("read_por", 0, 1, 14, PyTuple_GET_SIZE(__pyx_args)); __PYX_ERR(0, 396, __pyx_L3_error)
   __pyx_L3_error:;
   __Pyx_AddTraceback("pyreadstat.pyreadstat.read_por", __pyx_clineno, __pyx_lineno, __pyx_filename);
   __Pyx_RefNannyFinishContext();
   return NULL;
   __pyx_L4_argument_unpacking_done:;
-  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_encoding), (&PyString_Type), 1, "encoding", 1))) __PYX_ERR(0, 377, __pyx_L1_error)
-  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_usecols), (&PyList_Type), 1, "usecols", 1))) __PYX_ERR(0, 377, __pyx_L1_error)
-  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_output_format), (&PyString_Type), 1, "output_format", 1))) __PYX_ERR(0, 378, __pyx_L1_error)
-  __pyx_r = __pyx_pf_10pyreadstat_10pyreadstat_8read_por(__pyx_self, __pyx_v_filename_path, __pyx_v_metadataonly, __pyx_v_dates_as_pandas_datetime, __pyx_v_apply_value_formats, __pyx_v_formats_as_category, __pyx_v_formats_as_ordered_category, __pyx_v_encoding, __pyx_v_usecols, __pyx_v_disable_datetime_conversion, __pyx_v_row_limit, __pyx_v_row_offset, __pyx_v_output_format);
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_encoding), (&PyString_Type), 1, "encoding", 1))) __PYX_ERR(0, 397, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_usecols), (&PyList_Type), 1, "usecols", 1))) __PYX_ERR(0, 397, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_output_format), (&PyString_Type), 1, "output_format", 1))) __PYX_ERR(0, 398, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_extra_datetime_formats), (&PyList_Type), 1, "extra_datetime_formats", 1))) __PYX_ERR(0, 399, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_extra_date_formats), (&PyList_Type), 1, "extra_date_formats", 1))) __PYX_ERR(0, 399, __pyx_L1_error)
+  __pyx_r = __pyx_pf_10pyreadstat_10pyreadstat_8read_por(__pyx_self, __pyx_v_filename_path, __pyx_v_metadataonly, __pyx_v_dates_as_pandas_datetime, __pyx_v_apply_value_formats, __pyx_v_formats_as_category, __pyx_v_formats_as_ordered_category, __pyx_v_encoding, __pyx_v_usecols, __pyx_v_disable_datetime_conversion, __pyx_v_row_limit, __pyx_v_row_offset, __pyx_v_output_format, __pyx_v_extra_datetime_formats, __pyx_v_extra_date_formats);
 
-  /* "pyreadstat/pyreadstat.pyx":376
+  /* "pyreadstat/pyreadstat.pyx":396
  * 
  * 
  * def read_por(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,             # <<<<<<<<<<<<<<
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
  */
 
   /* function exit code */
@@ -4905,7 +5082,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_9read_por(PyObject *__pyx_se
   return __pyx_r;
 }
 
-static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_8read_por(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_apply_value_formats, PyObject *__pyx_v_formats_as_category, CYTHON_UNUSED PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format) {
+static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_8read_por(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_filename_path, PyObject *__pyx_v_metadataonly, PyObject *__pyx_v_dates_as_pandas_datetime, PyObject *__pyx_v_apply_value_formats, PyObject *__pyx_v_formats_as_category, CYTHON_UNUSED PyObject *__pyx_v_formats_as_ordered_category, PyObject *__pyx_v_encoding, PyObject *__pyx_v_usecols, PyObject *__pyx_v_disable_datetime_conversion, int __pyx_v_row_limit, int __pyx_v_row_offset, PyObject *__pyx_v_output_format, PyObject *__pyx_v_extra_datetime_formats, PyObject *__pyx_v_extra_date_formats) {
   int __pyx_v_metaonly;
   int __pyx_v_dates_as_pandas;
   int __pyx_v_usernan;
@@ -4926,7 +5103,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_8read_por(CYTHON_UNUSED PyOb
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("read_por", 0);
 
-  /* "pyreadstat/pyreadstat.pyx":431
+  /* "pyreadstat/pyreadstat.pyx":456
  *     """
  * 
  *     cdef bint metaonly = 0             # <<<<<<<<<<<<<<
@@ -4935,17 +5112,17 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_8read_por(CYTHON_UNUSED PyOb
  */
   __pyx_v_metaonly = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":432
+  /* "pyreadstat/pyreadstat.pyx":457
  * 
  *     cdef bint metaonly = 0
  *     if metadataonly:             # <<<<<<<<<<<<<<
  *         metaonly = 1
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-    /* "pyreadstat/pyreadstat.pyx":432
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-  /* "pyreadstat/pyreadstat.pyx":436
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-  /* "pyreadstat/pyreadstat.pyx":439
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-    /* "pyreadstat/pyreadstat.pyx":443
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-    /* "pyreadstat/pyreadstat.pyx":442
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-  /* "pyreadstat/pyreadstat.pyx":445
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-  /* "pyreadstat/pyreadstat.pyx":446
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+  __pyx_t_2 = __pyx_f_10pyreadstat_16_readstat_parser_run_conversion(__pyx_v_filename_path, __pyx_v_file_format, readstat_parse_por, __pyx_v_encoding, __pyx_v_metaonly, __pyx_v_dates_as_pandas, __pyx_v_usecols, __pyx_v_usernan, __pyx_v_no_datetime_conversion, ((long)__pyx_v_row_limit), ((long)__pyx_v_row_offset), __pyx_v_output_format, __pyx_v_extra_datetime_formats, __pyx_v_extra_date_formats); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 471, __pyx_L1_error)
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@@ -5070,7 +5247,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_8read_por(CYTHON_UNUSED PyOb
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-    __pyx_t_3 = PySequence_ITEM(sequence, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 446, __pyx_L1_error)
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   __pyx_v_metadata = __pyx_t_4;
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-  /* "pyreadstat/pyreadstat.pyx":449
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- *                                           output_format)
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-  /* "pyreadstat/pyreadstat.pyx":450
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-    __pyx_t_4 = PyTuple_New(2); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 451, __pyx_L1_error)
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-    /* "pyreadstat/pyreadstat.pyx":450
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-  /* "pyreadstat/pyreadstat.pyx":453
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-  /* "pyreadstat/pyreadstat.pyx":493
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-  /* "pyreadstat/pyreadstat.pyx":494
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  *     cdef long row_offset=0             # <<<<<<<<<<<<<<
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- *     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_SAS
+ *     cdef list extra_datetime_formats=None
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-  /* "pyreadstat/pyreadstat.pyx":496
+  /* "pyreadstat/pyreadstat.pyx":520
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+ *     cdef long row_offset=0
+ *     cdef list extra_datetime_formats=None             # <<<<<<<<<<<<<<
+ *     cdef list extra_date_formats=None
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+  __pyx_v_extra_datetime_formats = ((PyObject*)Py_None);
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+  /* "pyreadstat/pyreadstat.pyx":521
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+ *     cdef list extra_date_formats=None             # <<<<<<<<<<<<<<
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+  /* "pyreadstat/pyreadstat.pyx":523
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+  __Pyx_XDECREF(__pyx_v_extra_datetime_formats);
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   __Pyx_XDECREF(__pyx_v_data_frame);
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+  __pyx_f_10pyreadstat_16_readstat_writer_run_write(__pyx_v_df, __pyx_v_dst_path, __pyx_e_10pyreadstat_16_readstat_writer_FILE_FORMAT_SAV, __pyx_v_file_label, __pyx_v_column_labels, __pyx_v_file_format_version, __pyx_v_note, ((PyObject*)__pyx_v_table_name), __pyx_v_variable_value_labels, __pyx_v_missing_ranges, __pyx_v_missing_user_values, __pyx_v_variable_alignment, __pyx_v_variable_display_width, __pyx_v_variable_measure, __pyx_v_variable_format, __pyx_v_row_compression); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 849, __pyx_L1_error)
 
-  /* "pyreadstat/pyreadstat.pyx":751
+  /* "pyreadstat/pyreadstat.pyx":778
  * # Write API
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@@ -9949,7 +10150,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_21write_sav(CYTHON_UNUSED Py
   return __pyx_r;
 }
 
-/* "pyreadstat/pyreadstat.pyx":826
+/* "pyreadstat/pyreadstat.pyx":853
  *         variable_alignment, variable_display_width, variable_measure, variable_format, row_compression)
  * 
  * def write_dta(df, dst_path, str file_label="", object column_labels=None, int version=15,             # <<<<<<<<<<<<<<
@@ -9982,7 +10183,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_24write_dta(PyObject *__pyx_
     values[2] = ((PyObject*)__pyx_kp_s__5);
     values[3] = ((PyObject *)Py_None);
 
-    /* "pyreadstat/pyreadstat.pyx":827
+    /* "pyreadstat/pyreadstat.pyx":854
  * 
  * def write_dta(df, dst_path, str file_label="", object column_labels=None, int version=15,
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@@ -10024,7 +10225,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_24write_dta(PyObject *__pyx_
         case  1:
         if (likely((values[1] = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_dst_path)) != 0)) kw_args--;
         else {
-          __Pyx_RaiseArgtupleInvalid("write_dta", 0, 2, 8, 1); __PYX_ERR(0, 826, __pyx_L3_error)
+          __Pyx_RaiseArgtupleInvalid("write_dta", 0, 2, 8, 1); __PYX_ERR(0, 853, __pyx_L3_error)
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         CYTHON_FALLTHROUGH;
         case  2:
@@ -10064,7 +10265,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_24write_dta(PyObject *__pyx_
         }
       }
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-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "write_dta") < 0)) __PYX_ERR(0, 826, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "write_dta") < 0)) __PYX_ERR(0, 853, __pyx_L3_error)
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@@ -10091,7 +10292,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_24write_dta(PyObject *__pyx_
     __pyx_v_file_label = ((PyObject*)values[2]);
     __pyx_v_column_labels = values[3];
     if (values[4]) {
-      __pyx_v_version = __Pyx_PyInt_As_int(values[4]); if (unlikely((__pyx_v_version == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 826, __pyx_L3_error)
+      __pyx_v_version = __Pyx_PyInt_As_int(values[4]); if (unlikely((__pyx_v_version == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 853, __pyx_L3_error)
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@@ -10101,19 +10302,19 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_24write_dta(PyObject *__pyx_
   }
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L5_argtuple_error:;
-  __Pyx_RaiseArgtupleInvalid("write_dta", 0, 2, 8, PyTuple_GET_SIZE(__pyx_args)); __PYX_ERR(0, 826, __pyx_L3_error)
+  __Pyx_RaiseArgtupleInvalid("write_dta", 0, 2, 8, PyTuple_GET_SIZE(__pyx_args)); __PYX_ERR(0, 853, __pyx_L3_error)
   __pyx_L3_error:;
   __Pyx_AddTraceback("pyreadstat.pyreadstat.write_dta", __pyx_clineno, __pyx_lineno, __pyx_filename);
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   return NULL;
   __pyx_L4_argument_unpacking_done:;
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-  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_missing_user_values), (&PyDict_Type), 1, "missing_user_values", 1))) __PYX_ERR(0, 827, __pyx_L1_error)
-  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_variable_format), (&PyDict_Type), 1, "variable_format", 1))) __PYX_ERR(0, 827, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_file_label), (&PyString_Type), 1, "file_label", 1))) __PYX_ERR(0, 853, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_variable_value_labels), (&PyDict_Type), 1, "variable_value_labels", 1))) __PYX_ERR(0, 854, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_missing_user_values), (&PyDict_Type), 1, "missing_user_values", 1))) __PYX_ERR(0, 854, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_variable_format), (&PyDict_Type), 1, "variable_format", 1))) __PYX_ERR(0, 854, __pyx_L1_error)
   __pyx_r = __pyx_pf_10pyreadstat_10pyreadstat_23write_dta(__pyx_self, __pyx_v_df, __pyx_v_dst_path, __pyx_v_file_label, __pyx_v_column_labels, __pyx_v_version, __pyx_v_variable_value_labels, __pyx_v_missing_user_values, __pyx_v_variable_format);
 
-  /* "pyreadstat/pyreadstat.pyx":826
+  /* "pyreadstat/pyreadstat.pyx":853
  *         variable_alignment, variable_display_width, variable_measure, variable_format, row_compression)
  * 
  * def write_dta(df, dst_path, str file_label="", object column_labels=None, int version=15,             # <<<<<<<<<<<<<<
@@ -10147,7 +10348,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
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-  /* "pyreadstat/pyreadstat.pyx":860
+  /* "pyreadstat/pyreadstat.pyx":887
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  *     if version == 15:             # <<<<<<<<<<<<<<
@@ -10157,7 +10358,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
   switch (__pyx_v_version) {
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-    /* "pyreadstat/pyreadstat.pyx":861
+    /* "pyreadstat/pyreadstat.pyx":888
  * 
  *     if version == 15:
  *         file_format_version = 119             # <<<<<<<<<<<<<<
@@ -10166,7 +10367,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
  */
     __pyx_v_file_format_version = 0x77;
 
-    /* "pyreadstat/pyreadstat.pyx":860
+    /* "pyreadstat/pyreadstat.pyx":887
  *     """
  * 
  *     if version == 15:             # <<<<<<<<<<<<<<
@@ -10176,7 +10377,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
     break;
     case 14:
 
-    /* "pyreadstat/pyreadstat.pyx":863
+    /* "pyreadstat/pyreadstat.pyx":890
  *         file_format_version = 119
  *     elif version == 14:
  *         file_format_version = 118             # <<<<<<<<<<<<<<
@@ -10185,7 +10386,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
  */
     __pyx_v_file_format_version = 0x76;
 
-    /* "pyreadstat/pyreadstat.pyx":862
+    /* "pyreadstat/pyreadstat.pyx":889
  *     if version == 15:
  *         file_format_version = 119
  *     elif version == 14:             # <<<<<<<<<<<<<<
@@ -10195,7 +10396,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
     break;
     case 13:
 
-    /* "pyreadstat/pyreadstat.pyx":865
+    /* "pyreadstat/pyreadstat.pyx":892
  *         file_format_version = 118
  *     elif version == 13:
  *         file_format_version = 117             # <<<<<<<<<<<<<<
@@ -10204,7 +10405,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
  */
     __pyx_v_file_format_version = 0x75;
 
-    /* "pyreadstat/pyreadstat.pyx":864
+    /* "pyreadstat/pyreadstat.pyx":891
  *     elif version == 14:
  *         file_format_version = 118
  *     elif version == 13:             # <<<<<<<<<<<<<<
@@ -10214,7 +10415,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
     break;
     case 12:
 
-    /* "pyreadstat/pyreadstat.pyx":867
+    /* "pyreadstat/pyreadstat.pyx":894
  *         file_format_version = 117
  *     elif version == 12:
  *         file_format_version = 115             # <<<<<<<<<<<<<<
@@ -10223,7 +10424,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
  */
     __pyx_v_file_format_version = 0x73;
 
-    /* "pyreadstat/pyreadstat.pyx":866
+    /* "pyreadstat/pyreadstat.pyx":893
  *     elif version == 13:
  *         file_format_version = 117
  *     elif version == 12:             # <<<<<<<<<<<<<<
@@ -10233,7 +10434,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
     break;
     case 10:
 
-    /* "pyreadstat/pyreadstat.pyx":868
+    /* "pyreadstat/pyreadstat.pyx":895
  *     elif version == 12:
  *         file_format_version = 115
  *     elif version in {10, 11}:             # <<<<<<<<<<<<<<
@@ -10242,7 +10443,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
  */
     case 11:
 
-    /* "pyreadstat/pyreadstat.pyx":869
+    /* "pyreadstat/pyreadstat.pyx":896
  *         file_format_version = 115
  *     elif version in {10, 11}:
  *         file_format_version = 114             # <<<<<<<<<<<<<<
@@ -10251,7 +10452,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
  */
     __pyx_v_file_format_version = 0x72;
 
-    /* "pyreadstat/pyreadstat.pyx":868
+    /* "pyreadstat/pyreadstat.pyx":895
  *     elif version == 12:
  *         file_format_version = 115
  *     elif version in {10, 11}:             # <<<<<<<<<<<<<<
@@ -10261,7 +10462,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
     break;
     case 8:
 
-    /* "pyreadstat/pyreadstat.pyx":870
+    /* "pyreadstat/pyreadstat.pyx":897
  *     elif version in {10, 11}:
  *         file_format_version = 114
  *     elif version in {8, 9}:             # <<<<<<<<<<<<<<
@@ -10270,7 +10471,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
  */
     case 9:
 
-    /* "pyreadstat/pyreadstat.pyx":871
+    /* "pyreadstat/pyreadstat.pyx":898
  *         file_format_version = 114
  *     elif version in {8, 9}:
  *         file_format_version = 113             # <<<<<<<<<<<<<<
@@ -10279,7 +10480,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
  */
     __pyx_v_file_format_version = 0x71;
 
-    /* "pyreadstat/pyreadstat.pyx":870
+    /* "pyreadstat/pyreadstat.pyx":897
  *     elif version in {10, 11}:
  *         file_format_version = 114
  *     elif version in {8, 9}:             # <<<<<<<<<<<<<<
@@ -10289,22 +10490,22 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
     break;
     default:
 
-    /* "pyreadstat/pyreadstat.pyx":873
+    /* "pyreadstat/pyreadstat.pyx":900
  *         file_format_version = 113
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  *         raise Exception("Version not supported")             # <<<<<<<<<<<<<<
  * 
  *     cdef str note = ""
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-    __pyx_t_1 = __Pyx_PyObject_Call(((PyObject *)(&((PyTypeObject*)PyExc_Exception)[0])), __pyx_tuple__6, NULL); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 873, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_PyObject_Call(((PyObject *)(&((PyTypeObject*)PyExc_Exception)[0])), __pyx_tuple__6, NULL); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 900, __pyx_L1_error)
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-    __PYX_ERR(0, 873, __pyx_L1_error)
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-  /* "pyreadstat/pyreadstat.pyx":875
+  /* "pyreadstat/pyreadstat.pyx":902
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  *     cdef str note = ""             # <<<<<<<<<<<<<<
@@ -10314,7 +10515,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
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   __pyx_v_note = __pyx_kp_s__5;
 
-  /* "pyreadstat/pyreadstat.pyx":876
+  /* "pyreadstat/pyreadstat.pyx":903
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  *     cdef str note = ""
  *     cdef str table_name = ""             # <<<<<<<<<<<<<<
@@ -10324,7 +10525,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
   __Pyx_INCREF(__pyx_kp_s__5);
   __pyx_v_table_name = __pyx_kp_s__5;
 
-  /* "pyreadstat/pyreadstat.pyx":877
+  /* "pyreadstat/pyreadstat.pyx":904
  *     cdef str note = ""
  *     cdef str table_name = ""
  *     cdef dict missing_ranges = None             # <<<<<<<<<<<<<<
@@ -10334,7 +10535,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
   __Pyx_INCREF(Py_None);
   __pyx_v_missing_ranges = ((PyObject*)Py_None);
 
-  /* "pyreadstat/pyreadstat.pyx":878
+  /* "pyreadstat/pyreadstat.pyx":905
  *     cdef str table_name = ""
  *     cdef dict missing_ranges = None
  *     cdef dict variable_alignment = None             # <<<<<<<<<<<<<<
@@ -10344,7 +10545,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
   __Pyx_INCREF(Py_None);
   __pyx_v_variable_alignment = ((PyObject*)Py_None);
 
-  /* "pyreadstat/pyreadstat.pyx":879
+  /* "pyreadstat/pyreadstat.pyx":906
  *     cdef dict missing_ranges = None
  *     cdef dict variable_alignment = None
  *     cdef dict variable_display_width = None             # <<<<<<<<<<<<<<
@@ -10354,7 +10555,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
   __Pyx_INCREF(Py_None);
   __pyx_v_variable_display_width = ((PyObject*)Py_None);
 
-  /* "pyreadstat/pyreadstat.pyx":880
+  /* "pyreadstat/pyreadstat.pyx":907
  *     cdef dict variable_alignment = None
  *     cdef dict variable_display_width = None
  *     cdef dict variable_measure = None             # <<<<<<<<<<<<<<
@@ -10364,7 +10565,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
   __Pyx_INCREF(Py_None);
   __pyx_v_variable_measure = ((PyObject*)Py_None);
 
-  /* "pyreadstat/pyreadstat.pyx":882
+  /* "pyreadstat/pyreadstat.pyx":909
  *     cdef dict variable_measure = None
  *     #cdef dict variable_format = None
  *     cdef bint row_compression = 0             # <<<<<<<<<<<<<<
@@ -10373,16 +10574,16 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
  */
   __pyx_v_row_compression = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":884
+  /* "pyreadstat/pyreadstat.pyx":911
  *     cdef bint row_compression = 0
  * 
  *     run_write(df, dst_path, _readstat_writer.FILE_FORMAT_DTA, file_label, column_labels, file_format_version,             # <<<<<<<<<<<<<<
  *      note, table_name, variable_value_labels, missing_ranges, missing_user_values, variable_alignment,
  *      variable_display_width, variable_measure, variable_format, row_compression)
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-  __pyx_f_10pyreadstat_16_readstat_writer_run_write(__pyx_v_df, __pyx_v_dst_path, __pyx_e_10pyreadstat_16_readstat_writer_FILE_FORMAT_DTA, __pyx_v_file_label, __pyx_v_column_labels, __pyx_v_file_format_version, __pyx_v_note, __pyx_v_table_name, __pyx_v_variable_value_labels, __pyx_v_missing_ranges, __pyx_v_missing_user_values, __pyx_v_variable_alignment, __pyx_v_variable_display_width, __pyx_v_variable_measure, __pyx_v_variable_format, __pyx_v_row_compression); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 884, __pyx_L1_error)
+  __pyx_f_10pyreadstat_16_readstat_writer_run_write(__pyx_v_df, __pyx_v_dst_path, __pyx_e_10pyreadstat_16_readstat_writer_FILE_FORMAT_DTA, __pyx_v_file_label, __pyx_v_column_labels, __pyx_v_file_format_version, __pyx_v_note, __pyx_v_table_name, __pyx_v_variable_value_labels, __pyx_v_missing_ranges, __pyx_v_missing_user_values, __pyx_v_variable_alignment, __pyx_v_variable_display_width, __pyx_v_variable_measure, __pyx_v_variable_format, __pyx_v_row_compression); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 911, __pyx_L1_error)
 
-  /* "pyreadstat/pyreadstat.pyx":826
+  /* "pyreadstat/pyreadstat.pyx":853
  *         variable_alignment, variable_display_width, variable_measure, variable_format, row_compression)
  * 
  * def write_dta(df, dst_path, str file_label="", object column_labels=None, int version=15,             # <<<<<<<<<<<<<<
@@ -10409,7 +10610,7 @@ static PyObject *__pyx_pf_10pyreadstat_10pyreadstat_23write_dta(CYTHON_UNUSED Py
   return __pyx_r;
 }
 
-/* "pyreadstat/pyreadstat.pyx":888
+/* "pyreadstat/pyreadstat.pyx":915
  *      variable_display_width, variable_measure, variable_format, row_compression)
  * 
  * def write_xport(df, dst_path, str file_label="", object column_labels=None, str table_name=None, int file_format_version = 8,             # <<<<<<<<<<<<<<
@@ -10442,7 +10643,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_26write_xport(PyObject *__py
     values[3] = ((PyObject *)Py_None);
     values[4] = ((PyObject*)Py_None);
 
-    /* "pyreadstat/pyreadstat.pyx":889
+    /* "pyreadstat/pyreadstat.pyx":916
  * 
  * def write_xport(df, dst_path, str file_label="", object column_labels=None, str table_name=None, int file_format_version = 8,
  *     dict variable_format=None):             # <<<<<<<<<<<<<<
@@ -10480,7 +10681,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_26write_xport(PyObject *__py
         case  1:
         if (likely((values[1] = __Pyx_PyDict_GetItemStr(__pyx_kwds, __pyx_n_s_dst_path)) != 0)) kw_args--;
         else {
-          __Pyx_RaiseArgtupleInvalid("write_xport", 0, 2, 7, 1); __PYX_ERR(0, 888, __pyx_L3_error)
+          __Pyx_RaiseArgtupleInvalid("write_xport", 0, 2, 7, 1); __PYX_ERR(0, 915, __pyx_L3_error)
         }
         CYTHON_FALLTHROUGH;
         case  2:
@@ -10514,7 +10715,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_26write_xport(PyObject *__py
         }
       }
       if (unlikely(kw_args > 0)) {
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "write_xport") < 0)) __PYX_ERR(0, 888, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_pyargnames, 0, values, pos_args, "write_xport") < 0)) __PYX_ERR(0, 915, __pyx_L3_error)
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     } else {
       switch (PyTuple_GET_SIZE(__pyx_args)) {
@@ -10540,7 +10741,7 @@ static PyObject *__pyx_pw_10pyreadstat_10pyreadstat_26write_xport(PyObject *__py
     __pyx_v_column_labels = values[3];
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  *     if "row_offset" in kwargs:
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-  __pyx_tuple__2 = PyTuple_Pack(1, __pyx_kp_s_read_sas7bcat_not_supported); if (unlikely(!__pyx_tuple__2)) __PYX_ERR(0, 652, __pyx_L1_error)
+  __pyx_tuple__2 = PyTuple_Pack(1, __pyx_kp_s_read_sas7bcat_not_supported); if (unlikely(!__pyx_tuple__2)) __PYX_ERR(0, 679, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__2);
   __Pyx_GIVEREF(__pyx_tuple__2);
 
-  /* "pyreadstat/pyreadstat.pyx":712
+  /* "pyreadstat/pyreadstat.pyx":739
  * 
  *     if read_function in (read_sas7bcat, read_xport, read_por):
  *         raise Exception("read_sas7bcat, read_xport and read_por are not supported")             # <<<<<<<<<<<<<<
  * 
  *     if not num_processes:
  */
-  __pyx_tuple__3 = PyTuple_Pack(1, __pyx_kp_s_read_sas7bcat_read_xport_and_rea); if (unlikely(!__pyx_tuple__3)) __PYX_ERR(0, 712, __pyx_L1_error)
+  __pyx_tuple__3 = PyTuple_Pack(1, __pyx_kp_s_read_sas7bcat_read_xport_and_rea); if (unlikely(!__pyx_tuple__3)) __PYX_ERR(0, 739, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__3);
   __Pyx_GIVEREF(__pyx_tuple__3);
 
-  /* "pyreadstat/pyreadstat.pyx":723
+  /* "pyreadstat/pyreadstat.pyx":750
  *     numrows = meta.number_rows
  *     if numrows is None:
  *         raise Exception("The number of rows of the file cannot be determined from the file's metadata")             # <<<<<<<<<<<<<<
  *     elif numrows == 0:
  *         final, meta = read_function(file_path, **kwargs)
  */
-  __pyx_tuple__4 = PyTuple_Pack(1, __pyx_kp_s_The_number_of_rows_of_the_file_c); if (unlikely(!__pyx_tuple__4)) __PYX_ERR(0, 723, __pyx_L1_error)
+  __pyx_tuple__4 = PyTuple_Pack(1, __pyx_kp_s_The_number_of_rows_of_the_file_c); if (unlikely(!__pyx_tuple__4)) __PYX_ERR(0, 750, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__4);
   __Pyx_GIVEREF(__pyx_tuple__4);
 
-  /* "pyreadstat/pyreadstat.pyx":873
+  /* "pyreadstat/pyreadstat.pyx":900
  *         file_format_version = 113
  *     else:
  *         raise Exception("Version not supported")             # <<<<<<<<<<<<<<
  * 
  *     cdef str note = ""
  */
-  __pyx_tuple__6 = PyTuple_Pack(1, __pyx_kp_s_Version_not_supported); if (unlikely(!__pyx_tuple__6)) __PYX_ERR(0, 873, __pyx_L1_error)
+  __pyx_tuple__6 = PyTuple_Pack(1, __pyx_kp_s_Version_not_supported); if (unlikely(!__pyx_tuple__6)) __PYX_ERR(0, 900, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__6);
   __Pyx_GIVEREF(__pyx_tuple__6);
 
@@ -11517,168 +11720,168 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
  * 
  * def read_sas7bdat(filename_path, metadataonly=False, dates_as_pandas_datetime=False, catalog_file=None,             # <<<<<<<<<<<<<<
  *                   formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *                   disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
  */
-  __pyx_tuple__8 = PyTuple_Pack(22, __pyx_n_s_filename_path, __pyx_n_s_metadataonly, __pyx_n_s_dates_as_pandas_datetime, __pyx_n_s_catalog_file, __pyx_n_s_formats_as_category, __pyx_n_s_formats_as_ordered_category, __pyx_n_s_encoding, __pyx_n_s_usecols, __pyx_n_s_user_missing, __pyx_n_s_disable_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_output_format, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata, __pyx_n_s__7, __pyx_n_s_catalog); if (unlikely(!__pyx_tuple__8)) __PYX_ERR(0, 41, __pyx_L1_error)
+  __pyx_tuple__8 = PyTuple_Pack(24, __pyx_n_s_filename_path, __pyx_n_s_metadataonly, __pyx_n_s_dates_as_pandas_datetime, __pyx_n_s_catalog_file, __pyx_n_s_formats_as_category, __pyx_n_s_formats_as_ordered_category, __pyx_n_s_encoding, __pyx_n_s_usecols, __pyx_n_s_user_missing, __pyx_n_s_disable_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_output_format, __pyx_n_s_extra_datetime_formats, __pyx_n_s_extra_date_formats, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata, __pyx_n_s__7, __pyx_n_s_catalog); if (unlikely(!__pyx_tuple__8)) __PYX_ERR(0, 41, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__8);
   __Pyx_GIVEREF(__pyx_tuple__8);
-  __pyx_codeobj__9 = (PyObject*)__Pyx_PyCode_New(13, 0, 22, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__8, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_sas7bdat, 41, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__9)) __PYX_ERR(0, 41, __pyx_L1_error)
+  __pyx_codeobj__9 = (PyObject*)__Pyx_PyCode_New(15, 0, 24, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__8, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_sas7bdat, 41, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__9)) __PYX_ERR(0, 41, __pyx_L1_error)
 
-  /* "pyreadstat/pyreadstat.pyx":134
+  /* "pyreadstat/pyreadstat.pyx":140
  * 
  * 
  * def read_xport(filename_path, metadataonly=False, dates_as_pandas_datetime=False, str encoding=None,             # <<<<<<<<<<<<<<
  *                list usecols=None, disable_datetime_conversion=False, int row_limit=0, int row_offset=0,
- *                str output_format=None):
+ *                str output_format=None, list extra_datetime_formats=None, list extra_date_formats=None):
  */
-  __pyx_tuple__10 = PyTuple_Pack(16, __pyx_n_s_filename_path, __pyx_n_s_metadataonly, __pyx_n_s_dates_as_pandas_datetime, __pyx_n_s_encoding, __pyx_n_s_usecols, __pyx_n_s_disable_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_output_format, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata); if (unlikely(!__pyx_tuple__10)) __PYX_ERR(0, 134, __pyx_L1_error)
+  __pyx_tuple__10 = PyTuple_Pack(18, __pyx_n_s_filename_path, __pyx_n_s_metadataonly, __pyx_n_s_dates_as_pandas_datetime, __pyx_n_s_encoding, __pyx_n_s_usecols, __pyx_n_s_disable_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_output_format, __pyx_n_s_extra_datetime_formats, __pyx_n_s_extra_date_formats, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata); if (unlikely(!__pyx_tuple__10)) __PYX_ERR(0, 140, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__10);
   __Pyx_GIVEREF(__pyx_tuple__10);
-  __pyx_codeobj__11 = (PyObject*)__Pyx_PyCode_New(9, 0, 16, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__10, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_xport, 134, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__11)) __PYX_ERR(0, 134, __pyx_L1_error)
+  __pyx_codeobj__11 = (PyObject*)__Pyx_PyCode_New(11, 0, 18, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__10, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_xport, 140, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__11)) __PYX_ERR(0, 140, __pyx_L1_error)
 
-  /* "pyreadstat/pyreadstat.pyx":202
+  /* "pyreadstat/pyreadstat.pyx":212
  * 
  * 
  * def read_dta(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,             # <<<<<<<<<<<<<<
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
  */
-  __pyx_tuple__12 = PyTuple_Pack(20, __pyx_n_s_filename_path, __pyx_n_s_metadataonly, __pyx_n_s_dates_as_pandas_datetime, __pyx_n_s_apply_value_formats, __pyx_n_s_formats_as_category, __pyx_n_s_formats_as_ordered_category, __pyx_n_s_encoding, __pyx_n_s_usecols, __pyx_n_s_user_missing, __pyx_n_s_disable_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_output_format, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata); if (unlikely(!__pyx_tuple__12)) __PYX_ERR(0, 202, __pyx_L1_error)
+  __pyx_tuple__12 = PyTuple_Pack(22, __pyx_n_s_filename_path, __pyx_n_s_metadataonly, __pyx_n_s_dates_as_pandas_datetime, __pyx_n_s_apply_value_formats, __pyx_n_s_formats_as_category, __pyx_n_s_formats_as_ordered_category, __pyx_n_s_encoding, __pyx_n_s_usecols, __pyx_n_s_user_missing, __pyx_n_s_disable_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_output_format, __pyx_n_s_extra_datetime_formats, __pyx_n_s_extra_date_formats, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata); if (unlikely(!__pyx_tuple__12)) __PYX_ERR(0, 212, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__12);
   __Pyx_GIVEREF(__pyx_tuple__12);
-  __pyx_codeobj__13 = (PyObject*)__Pyx_PyCode_New(13, 0, 20, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__12, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_dta, 202, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__13)) __PYX_ERR(0, 202, __pyx_L1_error)
+  __pyx_codeobj__13 = (PyObject*)__Pyx_PyCode_New(15, 0, 22, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__12, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_dta, 212, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__13)) __PYX_ERR(0, 212, __pyx_L1_error)
 
-  /* "pyreadstat/pyreadstat.pyx":289
+  /* "pyreadstat/pyreadstat.pyx":304
  * 
  * 
  * def read_sav(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,             # <<<<<<<<<<<<<<
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None, list extra_datetime_formats=None,
  */
-  __pyx_tuple__14 = PyTuple_Pack(20, __pyx_n_s_filename_path, __pyx_n_s_metadataonly, __pyx_n_s_dates_as_pandas_datetime, __pyx_n_s_apply_value_formats, __pyx_n_s_formats_as_category, __pyx_n_s_formats_as_ordered_category, __pyx_n_s_encoding, __pyx_n_s_usecols, __pyx_n_s_user_missing, __pyx_n_s_disable_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_output_format, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata); if (unlikely(!__pyx_tuple__14)) __PYX_ERR(0, 289, __pyx_L1_error)
+  __pyx_tuple__14 = PyTuple_Pack(22, __pyx_n_s_filename_path, __pyx_n_s_metadataonly, __pyx_n_s_dates_as_pandas_datetime, __pyx_n_s_apply_value_formats, __pyx_n_s_formats_as_category, __pyx_n_s_formats_as_ordered_category, __pyx_n_s_encoding, __pyx_n_s_usecols, __pyx_n_s_user_missing, __pyx_n_s_disable_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_output_format, __pyx_n_s_extra_datetime_formats, __pyx_n_s_extra_date_formats, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata); if (unlikely(!__pyx_tuple__14)) __PYX_ERR(0, 304, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__14);
   __Pyx_GIVEREF(__pyx_tuple__14);
-  __pyx_codeobj__15 = (PyObject*)__Pyx_PyCode_New(13, 0, 20, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__14, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_sav, 289, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__15)) __PYX_ERR(0, 289, __pyx_L1_error)
+  __pyx_codeobj__15 = (PyObject*)__Pyx_PyCode_New(15, 0, 22, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__14, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_sav, 304, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__15)) __PYX_ERR(0, 304, __pyx_L1_error)
 
-  /* "pyreadstat/pyreadstat.pyx":376
+  /* "pyreadstat/pyreadstat.pyx":396
  * 
  * 
  * def read_por(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,             # <<<<<<<<<<<<<<
  *              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None,
- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
  */
-  __pyx_tuple__16 = PyTuple_Pack(19, __pyx_n_s_filename_path, __pyx_n_s_metadataonly, __pyx_n_s_dates_as_pandas_datetime, __pyx_n_s_apply_value_formats, __pyx_n_s_formats_as_category, __pyx_n_s_formats_as_ordered_category, __pyx_n_s_encoding, __pyx_n_s_usecols, __pyx_n_s_disable_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_output_format, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata); if (unlikely(!__pyx_tuple__16)) __PYX_ERR(0, 376, __pyx_L1_error)
+  __pyx_tuple__16 = PyTuple_Pack(21, __pyx_n_s_filename_path, __pyx_n_s_metadataonly, __pyx_n_s_dates_as_pandas_datetime, __pyx_n_s_apply_value_formats, __pyx_n_s_formats_as_category, __pyx_n_s_formats_as_ordered_category, __pyx_n_s_encoding, __pyx_n_s_usecols, __pyx_n_s_disable_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_output_format, __pyx_n_s_extra_datetime_formats, __pyx_n_s_extra_date_formats, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata); if (unlikely(!__pyx_tuple__16)) __PYX_ERR(0, 396, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__16);
   __Pyx_GIVEREF(__pyx_tuple__16);
-  __pyx_codeobj__17 = (PyObject*)__Pyx_PyCode_New(12, 0, 19, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__16, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_por, 376, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__17)) __PYX_ERR(0, 376, __pyx_L1_error)
+  __pyx_codeobj__17 = (PyObject*)__Pyx_PyCode_New(14, 0, 21, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__16, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_por, 396, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__17)) __PYX_ERR(0, 396, __pyx_L1_error)
 
-  /* "pyreadstat/pyreadstat.pyx":457
+  /* "pyreadstat/pyreadstat.pyx":482
  * 
  * 
  * def read_sas7bcat(filename_path, str encoding=None, str  output_format=None):             # <<<<<<<<<<<<<<
  *     r"""
  *     Read a SAS sas7bcat file. The returning dataframe will be empty. The metadata object will contain a dictionary
  */
-  __pyx_tuple__18 = PyTuple_Pack(13, __pyx_n_s_filename_path, __pyx_n_s_encoding, __pyx_n_s_output_format, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usecols, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata); if (unlikely(!__pyx_tuple__18)) __PYX_ERR(0, 457, __pyx_L1_error)
+  __pyx_tuple__18 = PyTuple_Pack(15, __pyx_n_s_filename_path, __pyx_n_s_encoding, __pyx_n_s_output_format, __pyx_n_s_metaonly, __pyx_n_s_dates_as_pandas, __pyx_n_s_usecols, __pyx_n_s_usernan, __pyx_n_s_no_datetime_conversion, __pyx_n_s_row_limit, __pyx_n_s_row_offset, __pyx_n_s_extra_datetime_formats, __pyx_n_s_extra_date_formats, __pyx_n_s_file_format, __pyx_n_s_data_frame, __pyx_n_s_metadata); if (unlikely(!__pyx_tuple__18)) __PYX_ERR(0, 482, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__18);
   __Pyx_GIVEREF(__pyx_tuple__18);
-  __pyx_codeobj__19 = (PyObject*)__Pyx_PyCode_New(3, 0, 13, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__18, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_sas7bcat, 457, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__19)) __PYX_ERR(0, 457, __pyx_L1_error)
+  __pyx_codeobj__19 = (PyObject*)__Pyx_PyCode_New(3, 0, 15, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__18, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_pyreadstat_pyreadstat_pyx, __pyx_n_s_read_sas7bcat, 482, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__19)) __PYX_ERR(0, 482, __pyx_L1_error)
 
-  /* "pyreadstat/pyreadstat.pyx":507
+  /* "pyreadstat/pyreadstat.pyx":534
  * 
  * 
  * def set_value_labels(dataframe, metadata, formats_as_category=True, formats_as_ordered_category=False):             # <<<<<<<<<<<<<<
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@@ -11748,7 +11951,7 @@ static int __Pyx_modinit_type_init_code(void) {
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@@ -11829,7 +12032,7 @@ static int __Pyx_modinit_function_import_code(void) {
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-  /* "pyreadstat/pyreadstat.pyx":134
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- *                str output_format=None):
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-  /* "pyreadstat/pyreadstat.pyx":202
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- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
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-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_5read_dta, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 202, __pyx_L1_error)
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-  /* "pyreadstat/pyreadstat.pyx":289
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- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
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-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_7read_sav, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 289, __pyx_L1_error)
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-  /* "pyreadstat/pyreadstat.pyx":376
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- *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+ *              disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
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-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_9read_por, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 376, __pyx_L1_error)
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-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_read_por, __pyx_t_2) < 0) __PYX_ERR(0, 376, __pyx_L1_error)
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   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":457
+  /* "pyreadstat/pyreadstat.pyx":482
  * 
  * 
  * def read_sas7bcat(filename_path, str encoding=None, str  output_format=None):             # <<<<<<<<<<<<<<
  *     r"""
  *     Read a SAS sas7bcat file. The returning dataframe will be empty. The metadata object will contain a dictionary
  */
-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_11read_sas7bcat, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 457, __pyx_L1_error)
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   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":507
+  /* "pyreadstat/pyreadstat.pyx":534
  * 
  * 
  * def set_value_labels(dataframe, metadata, formats_as_category=True, formats_as_ordered_category=False):             # <<<<<<<<<<<<<<
  *     """
  *     Changes the values in the dataframe according to the value formats in the metadata.
  */
-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_13set_value_labels, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 507, __pyx_L1_error)
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-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_set_value_labels, __pyx_t_2) < 0) __PYX_ERR(0, 507, __pyx_L1_error)
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   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":562
+  /* "pyreadstat/pyreadstat.pyx":589
  *     return df_copy
  * 
  * def set_catalog_to_sas(sas_dataframe, sas_metadata, catalog_metadata, formats_as_category=True,             # <<<<<<<<<<<<<<
  *                        formats_as_ordered_category=False):
  *     """
  */
-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_15set_catalog_to_sas, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 562, __pyx_L1_error)
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   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":615
+  /* "pyreadstat/pyreadstat.pyx":642
  * # convenience functions to read in chunks
  * 
  * def read_file_in_chunks(read_function, file_path, chunksize=100000, offset=0, limit=0,             # <<<<<<<<<<<<<<
  *                         multiprocess=False, num_processes=4, **kwargs):
  *     """
  */
-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_17read_file_in_chunks, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 615, __pyx_L1_error)
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   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":686
+  /* "pyreadstat/pyreadstat.pyx":713
  *             offset += chunksize
  * 
  * def read_file_multiprocessing(read_function, file_path, num_processes=None, **kwargs):             # <<<<<<<<<<<<<<
  *     """
  *     Reads a file in parallel using multiprocessing.
  */
-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_20read_file_multiprocessing, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 686, __pyx_L1_error)
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-  /* "pyreadstat/pyreadstat.pyx":751
+  /* "pyreadstat/pyreadstat.pyx":778
  * # Write API
  * 
  * def write_sav(df, dst_path, str file_label="", object column_labels=None, compress=False, row_compress=False, str note=None,             # <<<<<<<<<<<<<<
  *                 dict variable_value_labels=None, dict missing_ranges=None, dict variable_display_width=None,
  *                 dict variable_measure=None, dict variable_format=None):
  */
-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_22write_sav, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 751, __pyx_L1_error)
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-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_write_sav, __pyx_t_2) < 0) __PYX_ERR(0, 751, __pyx_L1_error)
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   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":826
+  /* "pyreadstat/pyreadstat.pyx":853
  *         variable_alignment, variable_display_width, variable_measure, variable_format, row_compression)
  * 
  * def write_dta(df, dst_path, str file_label="", object column_labels=None, int version=15,             # <<<<<<<<<<<<<<
  *             dict variable_value_labels=None, dict missing_user_values=None, dict variable_format=None):
  *     """
  */
-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_24write_dta, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 826, __pyx_L1_error)
+  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_24write_dta, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 853, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_2);
-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_write_dta, __pyx_t_2) < 0) __PYX_ERR(0, 826, __pyx_L1_error)
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_write_dta, __pyx_t_2) < 0) __PYX_ERR(0, 853, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":888
+  /* "pyreadstat/pyreadstat.pyx":915
  *      variable_display_width, variable_measure, variable_format, row_compression)
  * 
  * def write_xport(df, dst_path, str file_label="", object column_labels=None, str table_name=None, int file_format_version = 8,             # <<<<<<<<<<<<<<
  *     dict variable_format=None):
  *     """
  */
-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_26write_xport, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 888, __pyx_L1_error)
+  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_26write_xport, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 915, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_2);
-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_write_xport, __pyx_t_2) < 0) __PYX_ERR(0, 888, __pyx_L1_error)
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_write_xport, __pyx_t_2) < 0) __PYX_ERR(0, 915, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
-  /* "pyreadstat/pyreadstat.pyx":932
+  /* "pyreadstat/pyreadstat.pyx":959
  *         variable_alignment,variable_display_width, variable_measure, variable_format, row_compression)
  * 
  * def write_por(df, dst_path, str file_label="", object column_labels=None, dict variable_format=None):             # <<<<<<<<<<<<<<
  *     """
  *     Writes a pandas data frame to a SPSS POR file.
  */
-  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_28write_por, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 932, __pyx_L1_error)
+  __pyx_t_2 = PyCFunction_NewEx(&__pyx_mdef_10pyreadstat_10pyreadstat_28write_por, NULL, __pyx_n_s_pyreadstat_pyreadstat); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 959, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_2);
-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_write_por, __pyx_t_2) < 0) __PYX_ERR(0, 932, __pyx_L1_error)
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_write_por, __pyx_t_2) < 0) __PYX_ERR(0, 959, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
 
   /* "pyreadstat/pyreadstat.pyx":1
diff --git a/pyreadstat/pyreadstat.pyx b/pyreadstat/pyreadstat.pyx
index 59b8682..60a702d 100644
--- a/pyreadstat/pyreadstat.pyx
+++ b/pyreadstat/pyreadstat.pyx
@@ -40,7 +40,8 @@ from worker import worker
 
 def read_sas7bdat(filename_path, metadataonly=False, dates_as_pandas_datetime=False, catalog_file=None,
                   formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
-                  disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+                  disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
+                  list extra_datetime_formats=None, list extra_date_formats=None):
     r"""
     Read a SAS sas7bdat file.
     It accepts the path to a sas7bcat.
@@ -90,6 +91,11 @@ def read_sas7bdat(filename_path, metadataonly=False, dates_as_pandas_datetime=Fa
             one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the
             user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas
             dataframe is avoided.
+        extra_datetime_formats: list of str, optional
+            formats to be parsed as python datetime objects
+        extra_date_formats: list of str, optional
+            formats to be parsed as python date objects
+            
 
     Returns
     -------
@@ -120,7 +126,7 @@ def read_sas7bdat(filename_path, metadataonly=False, dates_as_pandas_datetime=Fa
     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_SAS
     data_frame, metadata = run_conversion(filename_path, file_format, readstat_parse_sas7bdat, encoding, metaonly,
                                           dates_as_pandas, usecols, usernan, no_datetime_conversion, <long>row_limit, <long>row_offset, 
-                                          output_format)
+                                          output_format, extra_datetime_formats, extra_date_formats)
     metadata.file_format = "sas7bdat"
 
     if catalog_file:
@@ -133,7 +139,7 @@ def read_sas7bdat(filename_path, metadataonly=False, dates_as_pandas_datetime=Fa
 
 def read_xport(filename_path, metadataonly=False, dates_as_pandas_datetime=False, str encoding=None,
                list usecols=None, disable_datetime_conversion=False, int row_limit=0, int row_offset=0,
-               str output_format=None):
+               str output_format=None, list extra_datetime_formats=None, list extra_date_formats=None):
     r"""
     Read a SAS xport file.
 
@@ -167,6 +173,10 @@ def read_xport(filename_path, metadataonly=False, dates_as_pandas_datetime=False
             one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the
             user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas
             dataframe is avoided.
+        extra_datetime_formats: list of str, optional
+            formats to be parsed as python datetime objects
+        extra_date_formats: list of str, optional
+            formats to be parsed as python date objects
 
     Returns
     -------
@@ -193,7 +203,7 @@ def read_xport(filename_path, metadataonly=False, dates_as_pandas_datetime=False
     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_SAS
     data_frame, metadata = run_conversion(filename_path, file_format, readstat_parse_xport, encoding, metaonly,
                                           dates_as_pandas, usecols, usernan, no_datetime_conversion, <long>row_limit, <long>row_offset,
-                                          output_format)
+                                          output_format, extra_datetime_formats, extra_date_formats)
     metadata.file_format = "xport"
 
     return data_frame, metadata
@@ -201,7 +211,8 @@ def read_xport(filename_path, metadataonly=False, dates_as_pandas_datetime=False
 
 def read_dta(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,
              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
-             disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+             disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
+             list extra_datetime_formats=None, list extra_date_formats=None):
     r"""
     Read a STATA dta file
 
@@ -248,6 +259,10 @@ def read_dta(filename_path, metadataonly=False, dates_as_pandas_datetime=False,
             one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the
             user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas
             dataframe is avoided.
+        extra_datetime_formats: list of str, optional
+            formats to be parsed as python datetime objects
+        extra_date_formats: list of str, optional
+            formats to be parsed as python date objects
 
     Returns
     -------
@@ -276,7 +291,7 @@ def read_dta(filename_path, metadataonly=False, dates_as_pandas_datetime=False,
     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_STATA
     data_frame, metadata = run_conversion(filename_path, file_format, readstat_parse_dta, encoding, metaonly,
                                           dates_as_pandas, usecols, usernan, no_datetime_conversion, <long>row_limit, <long>row_offset, 
-                                          output_format)
+                                          output_format, extra_datetime_formats, extra_date_formats)
     metadata.file_format = "dta"
 
     if apply_value_formats:
@@ -288,7 +303,8 @@ def read_dta(filename_path, metadataonly=False, dates_as_pandas_datetime=False,
 
 def read_sav(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,
              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None, user_missing=False,
-             disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+             disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None, list extra_datetime_formats=None, 
+             list extra_date_formats=None):
     r"""
     Read a SPSS sav or zsav (compressed) files
 
@@ -335,6 +351,10 @@ def read_sav(filename_path, metadataonly=False, dates_as_pandas_datetime=False,
             one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the
             user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas
             dataframe is avoided.
+        extra_datetime_formats: list of str, optional
+            formats to be parsed as python datetime objects
+        extra_date_formats: list of str, optional
+            formats to be parsed as python date objects
 
     Returns
     -------
@@ -363,7 +383,7 @@ def read_sav(filename_path, metadataonly=False, dates_as_pandas_datetime=False,
     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_SPSS
     data_frame, metadata = run_conversion(filename_path, file_format, readstat_parse_sav, encoding, metaonly,
                                           dates_as_pandas, usecols, usernan, no_datetime_conversion, <long>row_limit, <long>row_offset,
-                                          output_format)
+                                          output_format, extra_datetime_formats, extra_date_formats)
     metadata.file_format = "sav/zsav"
 
     if apply_value_formats:
@@ -375,7 +395,8 @@ def read_sav(filename_path, metadataonly=False, dates_as_pandas_datetime=False,
 
 def read_por(filename_path, metadataonly=False, dates_as_pandas_datetime=False, apply_value_formats=False,
              formats_as_category=True, formats_as_ordered_category=False, str encoding=None, list usecols=None,
-             disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None):
+             disable_datetime_conversion=False, int row_limit=0, int row_offset=0, str output_format=None,
+             list extra_datetime_formats=None, list extra_date_formats=None):
     r"""
     Read a SPSS por file
 
@@ -419,6 +440,10 @@ def read_por(filename_path, metadataonly=False, dates_as_pandas_datetime=False,
             one of 'pandas' (default) or 'dict'. If 'dict' a dictionary with numpy arrays as values will be returned, the
             user can then convert it to her preferred data format. Using dict is faster as the other types as the conversion to a pandas
             dataframe is avoided.
+        extra_datetime_formats: list of str, optional
+            formats to be parsed as python datetime objects
+        extra_date_formats: list of str, optional
+            formats to be parsed as python date objects
 
     Returns
     -------
@@ -445,7 +470,7 @@ def read_por(filename_path, metadataonly=False, dates_as_pandas_datetime=False,
     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_SPSS
     data_frame, metadata = run_conversion(filename_path, file_format, readstat_parse_por, encoding, metaonly,
                                           dates_as_pandas, usecols, usernan, no_datetime_conversion, <long>row_limit, <long>row_offset, 
-                                          output_format)
+                                          output_format, extra_datetime_formats, extra_date_formats)
     metadata.file_format = "por"
     if apply_value_formats:
         data_frame = set_value_labels(data_frame, metadata, formats_as_category=formats_as_category)
@@ -492,11 +517,13 @@ def read_sas7bcat(filename_path, str encoding=None, str  output_format=None):
     cdef bint no_datetime_conversion = 0
     cdef long row_limit=0
     cdef long row_offset=0
+    cdef list extra_datetime_formats=None
+    cdef list extra_date_formats=None
 
     cdef py_file_format file_format = _readstat_parser.FILE_FORMAT_SAS
     data_frame, metadata = run_conversion(filename_path, file_format, readstat_parse_sas7bcat, encoding, metaonly,
                                           dates_as_pandas, usecols, usernan, no_datetime_conversion, row_limit, row_offset, 
-                                          output_format)
+                                          output_format, extra_datetime_formats, extra_date_formats)
     metadata.file_format = "sas7bcat"
 
     return data_frame, metadata
diff --git a/setup.py b/setup.py
index 62e8e38..171ff3e 100644
--- a/setup.py
+++ b/setup.py
@@ -127,7 +127,7 @@
 
 setup(
     name='pyreadstat',
-    version='1.2.0',
+    version='1.2.1',
     description=short_description,
     author="Otto Fajardo",
     author_email="pleasecontactviagithub@notvalid.com",
diff --git a/src/readstat_bits.h b/src/readstat_bits.h
index 9cfcadd..a89d9a2 100644
--- a/src/readstat_bits.h
+++ b/src/readstat_bits.h
@@ -7,7 +7,7 @@
 #undef READSTAT_MACHINE_IS_TWOS_COMPLEMENT
 #define READSTAT_MACHINE_IS_TWOS_COMPLEMENT 0
 
-int machine_is_little_endian();
+int machine_is_little_endian(void);
 
 char ones_to_twos_complement1(char num);
 int16_t ones_to_twos_complement2(int16_t num);
diff --git a/src/readstat_convert.c b/src/readstat_convert.c
index 1e54ca5..874cf97 100644
--- a/src/readstat_convert.c
+++ b/src/readstat_convert.c
@@ -7,7 +7,7 @@
 readstat_error_t readstat_convert(char *dst, size_t dst_len, const char *src, size_t src_len, iconv_t converter) {
     /* strip off spaces from the input because the programs use ASCII space
      * padding even with non-ASCII encoding. */
-    while (src_len && src[src_len-1] == ' ') {
+    while (src_len && (src[src_len-1] == ' ' || src[src_len-1] == '\0')) {
         src_len--;
     }
     if (dst_len == 0) {
diff --git a/src/readstat_malloc.c b/src/readstat_malloc.c
index 9549e46..2016853 100644
--- a/src/readstat_malloc.c
+++ b/src/readstat_malloc.c
@@ -1,9 +1,11 @@
 #include <stdlib.h>
 
-#define MAX_MALLOC_SIZE 0xFFF000
-/* ~16 MB. Needs to be at least 0x3FF00, i.e. the default ~4MB block size used
- * in compressed SPSS (ZSAV) files. The purpose here is to prevent massive
- * allocations in the event of a malformed file or a bug in the library. */
+#define MAX_MALLOC_SIZE 0x1000000
+/* =16 MiB. Needs to be at least 0x3FF00, i.e. the default ~4MB block size used
+ * in compressed SPSS (ZSAV) files. Some SAS installations use 16MiB page sizes
+ * by default, see https://github.com/tidyverse/haven/issues/697.
+ * The purpose here is to prevent massive allocations in the event of a
+ * malformed file or a bug in the library. */
 
 void *readstat_malloc(size_t len) {
     if (len > MAX_MALLOC_SIZE || len == 0) {
diff --git a/src/readstat_variable.c b/src/readstat_variable.c
index 0f730f8..6172abd 100644
--- a/src/readstat_variable.c
+++ b/src/readstat_variable.c
@@ -2,7 +2,7 @@
 #include <stdlib.h>
 #include "readstat.h"
 
-static readstat_value_t make_blank_value();
+static readstat_value_t make_blank_value(void);
 static readstat_value_t make_double_value(double dval);
 
 static readstat_value_t make_blank_value() {
diff --git a/src/sas/ieee.c b/src/sas/ieee.c
index 44233c7..f6b7d87 100644
--- a/src/sas/ieee.c
+++ b/src/sas/ieee.c
@@ -16,7 +16,7 @@ static void ieee2xpt(unsigned char *ieee, unsigned char *xport);
 
 #ifndef FLOATREP
 #define FLOATREP get_native()
-int get_native();
+int get_native(void);
 #endif
 
 void memreverse(void *intp_void, int l) {
diff --git a/src/sas/readstat_sas7bcat_read.c b/src/sas/readstat_sas7bcat_read.c
index 968d968..b3e14f0 100644
--- a/src/sas/readstat_sas7bcat_read.c
+++ b/src/sas/readstat_sas7bcat_read.c
@@ -60,7 +60,7 @@ static readstat_error_t sas7bcat_parse_value_labels(const char *value_start, siz
 
     /* Pass 1 -- find out the offset of the labels */
     for (i=0; i<label_count_capacity; i++) {
-        if (&lbp1[3] - value_start > value_labels_len || lbp1[2] < 0) {
+        if (&lbp1[3] - value_start > value_labels_len || sas_read2(&lbp1[2], ctx->bswap) < 0) {
             retval = READSTAT_ERROR_PARSE;
             goto cleanup;
         }
@@ -76,7 +76,7 @@ static readstat_error_t sas7bcat_parse_value_labels(const char *value_start, siz
             }
             value_offset[label_pos] = lbp1 - value_start;
         }
-        lbp1 += 6 + lbp1[2];
+        lbp1 += 6 + sas_read2(&lbp1[2], ctx->bswap);
     }
 
     const char *lbp2 = lbp1;
@@ -93,7 +93,7 @@ static readstat_error_t sas7bcat_parse_value_labels(const char *value_start, siz
         readstat_value_t value = { .type = is_string ? READSTAT_TYPE_STRING : READSTAT_TYPE_DOUBLE };
         char string_val[4*16+1];
         if (is_string) {
-            size_t value_entry_len = 6 + lbp1[2];
+            size_t value_entry_len = 6 + sas_read2(&lbp1[2], ctx->bswap);
             retval = readstat_convert(string_val, sizeof(string_val),
                     &lbp1[value_entry_len-16], 16, ctx->converter);
             if (retval != READSTAT_OK)
@@ -143,18 +143,20 @@ static readstat_error_t sas7bcat_parse_block(const char *data, size_t data_size,
     readstat_error_t retval = READSTAT_OK;
 
     size_t pad = 0;
-    int label_count_capacity = 0;
-    int label_count_used = 0;
+    uint64_t label_count_capacity = 0;
+    uint64_t label_count_used = 0;
     int payload_offset = 106;
+    uint16_t flags = 0;
     char name[4*32+1];
 
     if (data_size < payload_offset)
         goto cleanup;
 
-    pad = (data[2] & 0x08) ? 4 : 0; // might be 0x10, not sure
+    flags = sas_read2(&data[2], ctx->bswap);
+    pad = (flags & 0x08) ? 4 : 0; // might be 0x10, not sure
     if (ctx->u64) {
-        label_count_capacity = sas_read4(&data[42+pad], ctx->bswap);
-        label_count_used = sas_read4(&data[50+pad], ctx->bswap);
+        label_count_capacity = sas_read8(&data[42+pad], ctx->bswap);
+        label_count_used = sas_read8(&data[50+pad], ctx->bswap);
 
         payload_offset += 32;
     } else {
@@ -169,7 +171,7 @@ static readstat_error_t sas7bcat_parse_block(const char *data, size_t data_size,
         pad += 16;
     }
 
-    if ((data[2] & 0x80) && !ctx->u64) { // has long name
+    if (((flags & 0x80) && !ctx->u64) || ((flags & 0x20) && ctx->u64)) { // has long name
         if (data_size < payload_offset + pad + 32)
             goto cleanup;
 
@@ -182,6 +184,9 @@ static readstat_error_t sas7bcat_parse_block(const char *data, size_t data_size,
     if (data_size < payload_offset + pad)
         goto cleanup;
 
+    if (label_count_used == 0)
+        goto cleanup;
+
     if ((retval = sas7bcat_parse_value_labels(&data[payload_offset+pad], data_size - payload_offset - pad,
                     label_count_used, label_count_capacity, name, ctx)) != READSTAT_OK)
         goto cleanup;
@@ -200,15 +205,15 @@ static readstat_error_t sas7bcat_augment_index(const char *index, size_t len, sa
             break;
 
         if (xlsr[ctx->xlsr_O_offset] == 'O') {
-            uint32_t page = 0, pos = 0;
+            uint64_t page = 0, pos = 0;
             if (ctx->u64) {
-                page = sas_read4(&xlsr[8], ctx->bswap);
-                pos = sas_read4(&xlsr[16], ctx->bswap);
+                page = sas_read8(&xlsr[8], ctx->bswap);
+                pos = sas_read2(&xlsr[16], ctx->bswap);
             } else {
-                page = sas_read2(&xlsr[4], ctx->bswap);
+                page = sas_read4(&xlsr[4], ctx->bswap);
                 pos = sas_read2(&xlsr[8], ctx->bswap);
             }
-            ctx->block_pointers[ctx->block_pointers_used++] = ((uint64_t)page << 32) + pos;
+            ctx->block_pointers[ctx->block_pointers_used++] = (page << 32) + pos;
         }
 
         if (ctx->block_pointers_used == ctx->block_pointers_capacity) {
diff --git a/src/sas/readstat_sas_rle.c b/src/sas/readstat_sas_rle.c
index adb0289..5e52225 100644
--- a/src/sas/readstat_sas_rle.c
+++ b/src/sas/readstat_sas_rle.c
@@ -11,6 +11,8 @@ typedef SSIZE_T ssize_t;
 #include "readstat_sas_rle.h"
 
 #define SAS_RLE_COMMAND_COPY64          0
+#define SAS_RLE_COMMAND_COPY64_PLUS_4096 1
+#define SAS_RLE_COMMAND_COPY96          2
 #define SAS_RLE_COMMAND_INSERT_BYTE18   4
 #define SAS_RLE_COMMAND_INSERT_AT17     5
 #define SAS_RLE_COMMAND_INSERT_BLANK17  6
@@ -29,6 +31,7 @@ typedef SSIZE_T ssize_t;
 
 static size_t command_lengths[16] = {
     [SAS_RLE_COMMAND_COPY64] = 1,
+    [SAS_RLE_COMMAND_COPY64_PLUS_4096] = 1,
     [SAS_RLE_COMMAND_INSERT_BYTE18] = 2,
     [SAS_RLE_COMMAND_INSERT_AT17] = 1,
     [SAS_RLE_COMMAND_INSERT_BLANK17] = 1,
@@ -62,6 +65,10 @@ ssize_t sas_rle_decompress(void *output_buf, size_t output_len,
             case SAS_RLE_COMMAND_COPY64:
                 copy_len = (*input++) + 64 + length * 256;
                 break;
+            case SAS_RLE_COMMAND_COPY64_PLUS_4096:
+                copy_len = (*input++) + 64 + length * 256 + 4096;
+                break;
+            case SAS_RLE_COMMAND_COPY96: copy_len = length + 96; break;
             case SAS_RLE_COMMAND_INSERT_BYTE18:
                 insert_len = (*input++) + 18 + length * 256;
                 insert_byte = *input++;
diff --git a/src/spss/readstat_por.c b/src/spss/readstat_por.c
index 9c04702..05cf350 100644
--- a/src/spss/readstat_por.c
+++ b/src/spss/readstat_por.c
@@ -129,7 +129,7 @@ ssize_t por_utf8_encode(const unsigned char *input, size_t input_len,
             }
             /* TODO - For some reason that replacement character isn't recognized
              * by some systems, so be prepared to insert an ASCII space instead */
-            int printed = sprintf(output + offset, "%lc", codepoint);
+            int printed = snprintf(output + offset, output_len - offset, "%lc", codepoint);
             if (printed > 0) {
                 offset += printed;
             } else {
diff --git a/src/spss/readstat_por.h b/src/spss/readstat_por.h
index 07dbce0..e169d68 100644
--- a/src/spss/readstat_por.h
+++ b/src/spss/readstat_por.h
@@ -31,7 +31,7 @@ typedef struct por_ctx_s {
     ck_hash_table_t *var_dict;
 } por_ctx_t;
 
-por_ctx_t *por_ctx_init();
+por_ctx_t *por_ctx_init(void);
 void por_ctx_free(por_ctx_t *ctx);
 ssize_t por_utf8_encode(const unsigned char *input, size_t input_len, 
         char *output, size_t output_len, uint16_t lookup[256]);
diff --git a/src/spss/readstat_sav_parse.c b/src/spss/readstat_sav_parse.c
index fe01a2c..93df349 100644
--- a/src/spss/readstat_sav_parse.c
+++ b/src/spss/readstat_sav_parse.c
@@ -564,7 +564,7 @@ static const signed char _sav_very_long_string_parse_actions[] = {
 
 static const signed char _sav_very_long_string_parse_key_offsets[] = {
 	0, 0, 5, 19, 33, 47, 61, 75,
-	89, 103, 104, 106, 109, 111, 0
+	89, 103, 104, 106, 110, 112, 0
 };
 
 static const unsigned char _sav_very_long_string_parse_trans_keys[] = {
@@ -581,13 +581,13 @@ static const unsigned char _sav_very_long_string_parse_trans_keys[] = {
 	34u, 37u, 45u, 58u, 63u, 91u, 94u, 123u,
 	127u, 47u, 61u, 96u, 255u, 0u, 34u, 37u,
 	45u, 58u, 63u, 91u, 94u, 123u, 127u, 61u,
-	48u, 57u, 0u, 48u, 57u, 0u, 9u, 255u,
-	0u, 63u, 91u, 127u, 0u
+	48u, 57u, 0u, 9u, 48u, 57u, 0u, 9u,
+	255u, 0u, 63u, 91u, 127u, 0u
 };
 
 static const signed char _sav_very_long_string_parse_single_lengths[] = {
 	0, 1, 4, 4, 4, 4, 4, 4,
-	4, 1, 0, 1, 2, 1, 0
+	4, 1, 0, 2, 2, 1, 0
 };
 
 static const signed char _sav_very_long_string_parse_range_lengths[] = {
@@ -597,7 +597,7 @@ static const signed char _sav_very_long_string_parse_range_lengths[] = {
 
 static const signed char _sav_very_long_string_parse_index_offsets[] = {
 	0, 0, 4, 14, 24, 34, 44, 54,
-	64, 74, 76, 78, 81, 84, 0
+	64, 74, 76, 78, 82, 85, 0
 };
 
 static const signed char _sav_very_long_string_parse_cond_targs[] = {
@@ -610,10 +610,10 @@ static const signed char _sav_very_long_string_parse_cond_targs[] = {
 	0, 0, 0, 0, 0, 7, 0, 10,
 	0, 0, 0, 0, 0, 0, 0, 8,
 	0, 10, 0, 0, 0, 0, 0, 0,
-	0, 9, 10, 0, 11, 0, 12, 11,
-	0, 12, 13, 0, 0, 0, 0, 2,
-	0, 1, 2, 3, 4, 5, 6, 7,
-	8, 9, 10, 11, 12, 13, 0
+	0, 9, 10, 0, 11, 0, 12, 13,
+	11, 0, 12, 13, 0, 0, 0, 0,
+	2, 0, 1, 2, 3, 4, 5, 6,
+	7, 8, 9, 10, 11, 12, 13, 0
 };
 
 static const signed char _sav_very_long_string_parse_cond_actions[] = {
@@ -626,10 +626,15 @@ static const signed char _sav_very_long_string_parse_cond_actions[] = {
 	0, 0, 0, 0, 0, 0, 0, 7,
 	0, 0, 0, 0, 0, 0, 0, 0,
 	0, 7, 0, 0, 0, 0, 0, 0,
-	0, 0, 7, 0, 10, 0, 3, 5,
-	0, 0, 0, 0, 0, 0, 0, 1,
-	0, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 0
+	0, 0, 7, 0, 10, 0, 3, 3,
+	5, 0, 0, 0, 0, 0, 0, 0,
+	1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 3, 0, 0, 0
+};
+
+static const signed char _sav_very_long_string_parse_eof_trans[] = {
+	90, 91, 92, 93, 94, 95, 96, 97,
+	98, 99, 100, 101, 102, 103, 0
 };
 
 static const int sav_very_long_string_parse_start = 1;
@@ -654,6 +659,7 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
 	char *error_buf = NULL;
 	unsigned char *p = c_data;
 	unsigned char *pe = c_data + count;
+	unsigned char *eof = pe;
 	
 	varlookup_t *table = NULL;
 	int cs;
@@ -662,12 +668,12 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
 	table = build_lookup_table(var_count, ctx);
 	
 	
-#line 666 "src/spss/readstat_sav_parse.c"
+#line 672 "src/spss/readstat_sav_parse.c"
 	{
 		cs = (int)sav_very_long_string_parse_start;
 	}
 	
-#line 671 "src/spss/readstat_sav_parse.c"
+#line 677 "src/spss/readstat_sav_parse.c"
 	{
 		int _klen;
 		unsigned int _trans = 0;
@@ -675,59 +681,66 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
 		const signed char * _acts;
 		unsigned int _nacts;
 		_resume: {}
-		if ( p == pe )
+		if ( p == pe && p != eof )
 			goto _out;
-		_keys = ( _sav_very_long_string_parse_trans_keys + (_sav_very_long_string_parse_key_offsets[cs]));
-		_trans = (unsigned int)_sav_very_long_string_parse_index_offsets[cs];
-		
-		_klen = (int)_sav_very_long_string_parse_single_lengths[cs];
-		if ( _klen > 0 ) {
-			const unsigned char *_lower = _keys;
-			const unsigned char *_upper = _keys + _klen - 1;
-			const unsigned char *_mid;
-			while ( 1 ) {
-				if ( _upper < _lower ) {
-					_keys += _klen;
-					_trans += (unsigned int)_klen;
-					break;
-				}
-				
-				_mid = _lower + ((_upper-_lower) >> 1);
-				if ( ( (*( p))) < (*( _mid)) )
-					_upper = _mid - 1;
-				else if ( ( (*( p))) > (*( _mid)) )
-					_lower = _mid + 1;
-				else {
-					_trans += (unsigned int)(_mid - _keys);
-					goto _match;
-				}
+		if ( p == eof ) {
+			if ( _sav_very_long_string_parse_eof_trans[cs] > 0 ) {
+				_trans = (unsigned int)_sav_very_long_string_parse_eof_trans[cs] - 1;
 			}
 		}
-		
-		_klen = (int)_sav_very_long_string_parse_range_lengths[cs];
-		if ( _klen > 0 ) {
-			const unsigned char *_lower = _keys;
-			const unsigned char *_upper = _keys + (_klen<<1) - 2;
-			const unsigned char *_mid;
-			while ( 1 ) {
-				if ( _upper < _lower ) {
-					_trans += (unsigned int)_klen;
-					break;
+		else {
+			_keys = ( _sav_very_long_string_parse_trans_keys + (_sav_very_long_string_parse_key_offsets[cs]));
+			_trans = (unsigned int)_sav_very_long_string_parse_index_offsets[cs];
+			
+			_klen = (int)_sav_very_long_string_parse_single_lengths[cs];
+			if ( _klen > 0 ) {
+				const unsigned char *_lower = _keys;
+				const unsigned char *_upper = _keys + _klen - 1;
+				const unsigned char *_mid;
+				while ( 1 ) {
+					if ( _upper < _lower ) {
+						_keys += _klen;
+						_trans += (unsigned int)_klen;
+						break;
+					}
+					
+					_mid = _lower + ((_upper-_lower) >> 1);
+					if ( ( (*( p))) < (*( _mid)) )
+						_upper = _mid - 1;
+					else if ( ( (*( p))) > (*( _mid)) )
+						_lower = _mid + 1;
+					else {
+						_trans += (unsigned int)(_mid - _keys);
+						goto _match;
+					}
 				}
-				
-				_mid = _lower + (((_upper-_lower) >> 1) & ~1);
-				if ( ( (*( p))) < (*( _mid)) )
-					_upper = _mid - 2;
-				else if ( ( (*( p))) > (*( _mid + 1)) )
-					_lower = _mid + 2;
-				else {
-					_trans += (unsigned int)((_mid - _keys)>>1);
-					break;
+			}
+			
+			_klen = (int)_sav_very_long_string_parse_range_lengths[cs];
+			if ( _klen > 0 ) {
+				const unsigned char *_lower = _keys;
+				const unsigned char *_upper = _keys + (_klen<<1) - 2;
+				const unsigned char *_mid;
+				while ( 1 ) {
+					if ( _upper < _lower ) {
+						_trans += (unsigned int)_klen;
+						break;
+					}
+					
+					_mid = _lower + (((_upper-_lower) >> 1) & ~1);
+					if ( ( (*( p))) < (*( _mid)) )
+						_upper = _mid - 2;
+					else if ( ( (*( p))) > (*( _mid + 1)) )
+						_lower = _mid + 2;
+					else {
+						_trans += (unsigned int)((_mid - _keys)>>1);
+						break;
+					}
 				}
 			}
+			
+			_match: {}
 		}
-		
-		_match: {}
 		cs = (int)_sav_very_long_string_parse_cond_targs[_trans];
 		
 		if ( _sav_very_long_string_parse_cond_actions[_trans] != 0 ) {
@@ -746,7 +759,7 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
 							temp_key[str_len] = '\0';
 						}
 						
-#line 750 "src/spss/readstat_sav_parse.c"
+#line 763 "src/spss/readstat_sav_parse.c"
 						
 						break; 
 					}
@@ -755,7 +768,7 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
 #line 20 "src/spss/readstat_sav_parse.rl"
 							str_start = p; }
 						
-#line 759 "src/spss/readstat_sav_parse.c"
+#line 772 "src/spss/readstat_sav_parse.c"
 						
 						break; 
 					}
@@ -764,13 +777,13 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
 #line 20 "src/spss/readstat_sav_parse.rl"
 							str_len = p - str_start; }
 						
-#line 768 "src/spss/readstat_sav_parse.c"
+#line 781 "src/spss/readstat_sav_parse.c"
 						
 						break; 
 					}
 					case 3:  {
 						{
-#line 177 "src/spss/readstat_sav_parse.rl"
+#line 178 "src/spss/readstat_sav_parse.rl"
 							
 							varlookup_t *found = bsearch(temp_key, table, var_count, sizeof(varlookup_t), &compare_key_varlookup);
 							if (found) {
@@ -780,13 +793,13 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
 							}
 						}
 						
-#line 784 "src/spss/readstat_sav_parse.c"
+#line 797 "src/spss/readstat_sav_parse.c"
 						
 						break; 
 					}
 					case 4:  {
 						{
-#line 186 "src/spss/readstat_sav_parse.rl"
+#line 187 "src/spss/readstat_sav_parse.rl"
 							
 							if ((( (*( p)))) != '\0') {
 								unsigned char digit = (( (*( p)))) - '0';
@@ -798,16 +811,16 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
 							}
 						}
 						
-#line 802 "src/spss/readstat_sav_parse.c"
+#line 815 "src/spss/readstat_sav_parse.c"
 						
 						break; 
 					}
 					case 5:  {
 						{
-#line 197 "src/spss/readstat_sav_parse.rl"
+#line 198 "src/spss/readstat_sav_parse.rl"
 							temp_val = 0; }
 						
-#line 811 "src/spss/readstat_sav_parse.c"
+#line 824 "src/spss/readstat_sav_parse.c"
 						
 						break; 
 					}
@@ -818,20 +831,26 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
 			
 		}
 		
-		if ( cs != 0 ) {
-			p += 1;
-			goto _resume;
+		if ( p == eof ) {
+			if ( cs >= 11 )
+				goto _out;
+		}
+		else {
+			if ( cs != 0 ) {
+				p += 1;
+				goto _resume;
+			}
 		}
 		_out: {}
 	}
 	
-#line 205 "src/spss/readstat_sav_parse.rl"
+#line 206 "src/spss/readstat_sav_parse.rl"
 	
 	
 	if (cs < 
-#line 833 "src/spss/readstat_sav_parse.c"
-	12
-#line 207 "src/spss/readstat_sav_parse.rl"
+#line 852 "src/spss/readstat_sav_parse.c"
+	11
+#line 208 "src/spss/readstat_sav_parse.rl"
 	|| p != pe) {
 		if (ctx->handle.error) {
 			snprintf(error_buf, error_buf_len, "Parsed %ld of %ld bytes. Remaining bytes: %.*s",
diff --git a/src/spss/readstat_sav_parse.rl b/src/spss/readstat_sav_parse.rl
index 5926ce4..1d98087 100644
--- a/src/spss/readstat_sav_parse.rl
+++ b/src/spss/readstat_sav_parse.rl
@@ -166,6 +166,7 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
     char *error_buf = NULL;
     unsigned char *p = c_data;
     unsigned char *pe = c_data + count;
+    unsigned char *eof = pe;
 
     varlookup_t *table = NULL;
     int cs;
@@ -198,7 +199,7 @@ readstat_error_t sav_parse_very_long_string_record(void *data, int count, sav_ct
         
         keyval = ( key %copy_key "=" value ) %set_width;
         
-        main := keyval ("\0"+ "\t" keyval)* "\0"+ "\t"?;
+        main := keyval ("\0"* "\t" keyval)* "\0"* "\t"?;
         
         write init;
         write exec;
diff --git a/src/spss/readstat_sav_read.c b/src/spss/readstat_sav_read.c
index 184f534..7f49490 100644
--- a/src/spss/readstat_sav_read.c
+++ b/src/spss/readstat_sav_read.c
@@ -53,9 +53,9 @@ static readstat_charset_entry_t _charset_table[] = {
     { .code = 866,   .name = "CP866" },
     { .code = 869,   .name = "CP869" },
     { .code = 874,   .name = "CP874" },
-    { .code = 932,   .name = "SHIFT-JIS" },
-    { .code = 936,   .name = "ISO-IR-58" },
-    { .code = 949,   .name = "ISO-IR-149" },
+    { .code = 932,   .name = "CP932" },
+    { .code = 936,   .name = "CP936" },
+    { .code = 949,   .name = "CP949" },
     { .code = 950,   .name = "BIG-5" },
     { .code = 1200,  .name = "UTF-16LE" },
     { .code = 1201,  .name = "UTF-16BE" },
@@ -1620,8 +1620,8 @@ readstat_error_t readstat_parse_sav(readstat_parser_t *parser, const char *path,
         ctx->row_limit = parser->row_limit;
     }
     
-    if ((retval = sav_parse_timestamp(ctx, &header)) != READSTAT_OK)
-        goto cleanup;
+    /* ignore errors */
+    sav_parse_timestamp(ctx, &header);
 
     if ((retval = sav_parse_records_pass1(ctx)) != READSTAT_OK)
         goto cleanup;
diff --git a/src/stata/readstat_dta_write.c b/src/stata/readstat_dta_write.c
index bd1adbd..5519b03 100644
--- a/src/stata/readstat_dta_write.c
+++ b/src/stata/readstat_dta_write.c
@@ -420,10 +420,10 @@ static readstat_error_t dta_emit_fmtlist(readstat_writer_t *writer, dta_ctx_t *c
             }
             char format[64];
             if (format_letter == 'g') {
-                sprintf(format, "%%%s%d.0g", r_variable->alignment == READSTAT_ALIGNMENT_LEFT ? "-" : "",
+                snprintf(format, sizeof(format), "%%%s%d.0g", r_variable->alignment == READSTAT_ALIGNMENT_LEFT ? "-" : "",
                         display_width);
             } else {
-                sprintf(format, "%%%s%ds",
+                snprintf(format, sizeof(format), "%%%s%ds",
                         r_variable->alignment == READSTAT_ALIGNMENT_LEFT ? "-" : "",
                         display_width);
             }
diff --git a/test_data/basic/date_test.sas7bdat b/test_data/basic/date_test.sas7bdat
new file mode 100644
index 0000000..c51ad38
Binary files /dev/null and b/test_data/basic/date_test.sas7bdat differ
diff --git a/tests/test_basic.py b/tests/test_basic.py
index 3c6bd0d..9ab1e89 100644
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -15,7 +15,7 @@
 # limitations under the License.
 # #############################################################################
 
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, date
 import unittest
 import os
 import sys
@@ -594,7 +594,6 @@ def test_chunk_reader(self):
             pass
         
         currow = self.df_nodates_sastata.iloc[1:3,:].reset_index(drop=True)
-        #import pdb;pdb.set_trace()
         self.assertTrue(df.equals(currow))
 
     # read multiprocessing
@@ -614,7 +613,6 @@ def test_chunk_reader_multiprocess(self):
             alldfs.append(df)
         df_multi = pd.concat(alldfs, axis=0, ignore_index=True) 
         df_single, meta_single = pyreadstat.read_sav(fpath)
-        #import pdb;pdb.set_trace()
         self.assertTrue(df_multi.equals(df_single))
 
     # writing
@@ -779,6 +777,7 @@ def test_xport_write_dates(self):
         path = os.path.join(self.write_folder, "dates_write.xpt")
         pyreadstat.write_xport(self.df_sas_dates2, path)
         df, meta = pyreadstat.read_xport(path)
+        #import pdb;pdb.set_trace()
         self.assertTrue(df.equals(self.df_sas_dates2))
 
     def test_sav_write_charnan(self):
@@ -910,6 +909,13 @@ def test_sas7bdat_file_label_linux(self):
         self.assertEqual(meta.file_label, "mytest label")
         self.assertEqual(meta.table_name, "TEST_DATA")
 
+    def test_sas7bdat_extra_date_formats(self):
+        "testing extra date format argument"
+        path = os.path.join(self.basic_data_folder, "date_test.sas7bdat")
+        df, meta = pyreadstat.read_sas7bdat(path, extra_date_formats=["MMYY", "YEAR"])
+        self.assertEqual(df['yr'].iloc[0], date(2023,1,1))
+        self.assertEqual(df['dtc4'].iloc[0], date(2023,7,1))
+
     def test_sas7bdat_file_label_windows(self):
         "testing file label for file produced on windows"
         path = os.path.join(self.basic_data_folder, "test_file_label_win.sas7bdat")