BUG: Added deprecation warning to Timestamp constructor

doc/source/whatsnew/v3.0.0.rst

@@ -416,6 +416,7 @@ Other Deprecations
 - Deprecated allowing non-keyword arguments in :meth:`Series.to_string` except ``buf``. (:issue:`57280`)
 - Deprecated behavior of :meth:`.DataFrameGroupBy.groups` and :meth:`.SeriesGroupBy.groups`, in a future version ``groups`` by one element list will return tuple instead of scalar. (:issue:`58858`)
 - Deprecated behavior of :meth:`Series.dt.to_pytimedelta`, in a future version this will return a :class:`Series` containing python ``datetime.timedelta`` objects instead of an ``ndarray`` of timedelta; this matches the behavior of other :meth:`Series.dt` properties. (:issue:`57463`)
+- Deprecated empty string in :class:`Timestamp` (:issue:`61149`)
 - Deprecated lowercase strings ``d``, ``b`` and ``c`` denoting frequencies in :class:`Day`, :class:`BusinessDay` and :class:`CustomBusinessDay` in favour of ``D``, ``B`` and ``C`` (:issue:`58998`)
 - Deprecated lowercase strings ``w``, ``w-mon``, ``w-tue``, etc. denoting frequencies in :class:`Week` in favour of ``W``, ``W-MON``, ``W-TUE``, etc. (:issue:`58998`)
 - Deprecated parameter ``method`` in :meth:`DataFrame.reindex_like` / :meth:`Series.reindex_like` (:issue:`58667`)

pandas/_libs/tslibs/timestamps.pyx

@@ -2645,6 +2645,14 @@ class Timestamp(_Timestamp):
                 "Passed data is timezone-aware, incompatible with 'tz=None'."
             )
 
+        if ts_input == "":
+            warnings.warn(
+                "Passing an empty string to Timestamp is deprecated and will raise "
+                "a ValueError in a future version.",
+                FutureWarning,
+                stacklevel = 2
+            )
+
         return create_timestamp_from_ts(ts.value, ts.dts, ts.tzinfo, ts.fold, ts.creso)
 
     def _round(self, freq, mode, ambiguous="raise", nonexistent="raise"):

pandas/tests/scalar/timestamp/test_constructors.py

@@ -62,6 +62,11 @@ def test_constructor_float_not_round_with_YM_unit_raises(self):
         with pytest.raises(ValueError, match=msg):
             Timestamp(150.5, unit="M")
 
+    def test_constructor_with_empty_string(self):
+        msg = "Passing an empty string to Timestamp"
+        with tm.assert_produces_warning(FutureWarning, match=msg):
+            Timestamp("")
+
     @pytest.mark.parametrize(
         "value, check_kwargs",
         [