diff --git a/radicale/tests/static/event_full_day_rrule.ics b/radicale/tests/static/event_full_day_rrule.ics
index 88f81c7d..76c0050a 100644
--- a/radicale/tests/static/event_full_day_rrule.ics
+++ b/radicale/tests/static/event_full_day_rrule.ics
@@ -5,14 +5,14 @@ BEGIN:VTIMEZONE
 LAST-MODIFIED:20040110T032845Z
 TZID:US/Eastern
 BEGIN:DAYLIGHT
-DTSTART:20000404
+DTSTART:20000404T020000
 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4
 TZNAME:EDT
 TZOFFSETFROM:-0500
 TZOFFSETTO:-0400
 END:DAYLIGHT
 BEGIN:STANDARD
-DTSTART:20001026
+DTSTART:20001026T020000
 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
 TZNAME:EST
 TZOFFSETFROM:-0400