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Editorial Team
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Asked: 2026-06-08T22:33:43+00:00

This issue is really frustrating me. I am developping a webapp that creates ical

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This issue is really frustrating me.
I am developping a webapp that creates ical files for users.

The issue that I am facing, is whenever the ical event repeates weekly or daily or monthly, the start time shows up wrong in Lotus Notes.
As you can see in the following file start time is 9:00 am, however in lotus notes (email client with calendar) this is showing completely wrong (as 5:00 am). I tried adding a timezone to the DTSTART and DTEND, but that doesn’t fix things, but creates more problems.
Is there something wrong perhaps in syntax; with the way I am generating the ical files?
Also the endtime is showeing up correctly for some reason, only the start time is wrong.

BEGIN:VCALENDAR
PRODID:-//Test event//iCal4j 1.0//EN
VERSION:2.0
BEGIN:VEVENT
DTSTAMP:20120730T124016Z
DTSTART:20120730T090014
DTEND:20120730T100014
SUMMARY:Test Meeting
UID:3988c7e1-4dd1-4e0c-b132-e829beac0592
LOCATION:test: at CR
DESCRIPTION:
RRULE:FREQ=WEEKLY;COUNT=30
END:VEVENT
END:VCALENDAR
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1 Answer

  1. Editorial Team

    I figured it out, I just needed to specify a Vtimezone.
    If someone else runs into this problem; something like the following would fix it.

    > BEGIN:VTIMEZONE TZID:Eastern BEGIN:STANDARD DTSTART:19501105T020000
> TZOFFSETFROM:-0400 TZOFFSETTO:-0500
> RRULE:FREQ=YEARLY;BYMINUTE=0;BYHOUR=2;BYDAY=1SU;BYMONTH=11
> END:STANDARD BEGIN:DAYLIGHT DTSTART:19500312T020000 TZOFFSETFROM:-0500
> TZOFFSETTO:-0400
> RRULE:FREQ=YEARLY;BYMINUTE=0;BYHOUR=2;BYDAY=2SU;BYMONTH=3 END:DAYLIGHT
> END:VTIMEZONE
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