diff --git a/icalendar_timeseries_server/cal.py b/icalendar_timeseries_server/cal.py
index 8db89b5..e4e479a 100644
--- a/icalendar_timeseries_server/cal.py
+++ b/icalendar_timeseries_server/cal.py
@@ -26,6 +26,8 @@ def _parse_recurring(event: cal.Event, start: datetime, end: datetime, duration:
     occurences: List[datetime] = []
 
     evstart = event.get('dtstart').dt
+    if isinstance(evstart, date) and not isinstance(evstart, datetime):
+        evstart = datetime(evstart.year, evstart.month, evstart.day, tzinfo=start.tzinfo)
     # First occurence lies in the future; no need to process further
     if evstart >= end:
         return occurences