Adapt parse_date to handle ISO dates

babel/dates.py

@@ -1152,6 +1152,10 @@ def parse_date(string, locale=LC_TIME, format='medium'):
     datetime.date(2004, 4, 1)
     >>> parse_date('01.04.2004', locale='de_DE')
     datetime.date(2004, 4, 1)
+    >>> parse_date('2004-04-01', locale='en_US')
+    datetime.date(2004, 4, 1)
+    >>> parse_date('2004-04-01', locale='de_DE')
+    datetime.date(2004, 4, 1)
 
     :param string: the string containing the date
     :param locale: a `Locale` object or a locale identifier
@@ -1177,12 +1181,19 @@ def parse_date(string, locale=LC_TIME, format='medium'):
     #        names, both in the requested locale, and english
 
     year = numbers[indexes['Y']]
+    day = numbers[indexes['D']]
+    month = numbers[indexes['M']]
     if len(year) == 2:
-        year = 2000 + int(year)
-    else:
-        year = int(year)
-    month = int(numbers[indexes['M']])
-    day = int(numbers[indexes['D']])
+        # check if we don't have an ISO kind of format
+        if len(day) == 4:  # day first locale
+            year, month, day = day, month, year
+        elif len(month) == 4:  # month first locale
+            year, month, day = month, day, year
+        else:
+            year = 2000 + int(year)
+    year = int(year)
+    month = int(month)
+    day = int(day)
     if month > 12:
         month, day = day, month
     return date(year, month, day)