feat: fix recurring_id timezone

icalevents/icalparser.py

@@ -449,6 +449,21 @@ def parse_events(content, start=None, end=None, default_span=timedelta(days=7)):
             elif e.end >= start and e.start <= end:
                 exdate = "%04d%02d%02d" % (e.start.year, e.start.month, e.start.day)
                 if exdate not in exceptions:
+                    if (
+                        type(e.recurrence_id) == datetime
+                        and type(component.get("dtstart").dt) == datetime
+                    ):
+                        naive = datetime(
+                            e.recurrence_id.year,
+                            e.recurrence_id.month,
+                            e.recurrence_id.day,
+                            e.recurrence_id.hour,
+                            e.recurrence_id.minute,
+                            e.recurrence_id.second,
+                        )
+                        e.recurrence_id = normalize(
+                            naive, tz=component.get("dtstart").dt.tzinfo
+                        )
                     found.append(e)
 
     result = found.copy()

test/test_icalevents.py

@@ -591,3 +591,19 @@ class ICalEventsTests(unittest.TestCase):
         self.assertEqual(
             e1.start.tzinfo, gettz("Europe/Zurich"), "check tz as specified in calendar"
         )
+
+    def test_recurring_override(self):
+        ical = "test/test_data/recurring_override.ics"
+        start = date(2021, 11, 23)
+        end = date(2021, 11, 24)
+
+        [e0, e1, e2] = icalevents.events(file=ical, start=start, end=end)
+
+        # Here all dates are in utc because the .ics has two timezones and this causes a transformation
+        self.assertEqual(e0.start, datetime(2021, 11, 23, 9, 0, tzinfo=UTC))
+        self.assertEqual(e1.start, datetime(2021, 11, 23, 10, 45, tzinfo=UTC))
+        self.assertEqual(
+            e2.start,
+            datetime(2021, 11, 23, 13, 0, tzinfo=UTC),
+            "moved 1 hour from 12:00 to 13:00",
+        )