Fixes #50

Add strict-mode handling for parsing DATE-TIME, and ignore leading
spaces if not strict.

test_files/vobject_0050.ics

@@ -0,0 +1,23 @@
+
+BEGIN:VCALENDAR
+PRODID:-//Force.com Labs//iCalendar Export//EN
+VERSION:2.0
+METHOD: REQUEST
+CALSCALE:GREGORIAN
+BEGIN:VEVENT
+STATUS:CONFIRMED
+ORGANIZER;CN=Wells Fargo and Company:mailto:appointments@wellsfargo.com
+UID:appointments@wellsfargo.com
+LOCATION:POJOAQUE
+CREATED:20240812T192015Z
+DTSTART:20240812T213000Z
+DTEND: 20240812T223000Z
+TRANSP:OPAQUE
+DURATION:PT60M
+SUMMARY:Personal: Open a new account
+DTSTAMP:20240812T192015Z
+LAST-MODIFIED:20240812T192015Z
+SEQUENCE:0
+DESCRIPTION:Personal: Open a new account
+END:VEVENT
+END:VCALENDAR

tests.py

@@ -843,6 +843,17 @@ def test_recurrence_offset_naive(self):
         self.assertEqual(dates[1], datetime.datetime(2013, 1, 24, 0, 0))
         self.assertEqual(dates[-1], datetime.datetime(2013, 3, 28, 0, 0))
 
+    def test_issue50(self):
+        """
+        Ensure leading spaces in a DATE-TIME value are ignored when not in
+        strict mode.
+
+        See https://github.com/py-vobject/vobject/issues/50
+        """
+        test_file = get_test_file("vobject_0050.ics")
+        cal = base.readOne(test_file)
+        self.assertEqual(datetime.datetime(2024, 8, 12, 22, 30, tzinfo=tzutc()), cal.vevent.dtend.value)
+
 
 class TestChangeTZ(unittest.TestCase):
     """

vobject/icalendar.py

@@ -1726,10 +1726,13 @@ def stringToDate(s):
     return datetime.date(year, month, day)
 
 
-def stringToDateTime(s, tzinfo=None):
+def stringToDateTime(s, tzinfo=None, strict=False):
     """
     Returns datetime.datetime object.
     """
+    if not strict:
+        s = s.strip()
+
     try:
         year = int(s[0:4])
         month = int(s[4:6])