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7/26/25
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Comment on [#11339] repeating meetings with next day in UTC time schedule on wrong day
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> When scheduling a repeating meeting whose date in the origin timezone > is different than the day in the UTC timezone, the resulting iCal > file has the scheduled times set to UTC time and date, but the > "BYDAY" repeating setting is not also adjusted for UTC time. > > For example, if I create a repeating meeting starting on Monday Aug > 13, 2012, at 23:00 (11pm) EDT (which is UTC-4) every Monday (again, > Monday in EDT timezone), then the resulting iCal file contains: > > DTSTART:20120814T030000Z > > which is correct, in UTC time the meeting starts Tuesday Aug 14, > 2012, at 03:00 UTC. However, in the repeating meeting section, it > incorrectly lists the repeating day as Monday: > > RRULE:FREQ=WEEKLY;INTERVAL=2;BYDAY=MO;UNTIL=20130101T045959Z > > Since the meeting time is listed in UTC, that repeating day must also > be listed in UTC, which in this case is Tuesday, not Monday. > > The result of this bug is that any calendar that uses the BYDAY field > will schedule all the repeating meetings on the day before they > actually should occur; in the above example, the Monday night > meetings would be shown as Sunday night meetings, on any calendar > application that uses the BYDAY field. > > This can be worked around by selecting the "Repeat On" day as one day > ahead of the actual day; in the above example where meetings repeat > every Monday at 23:00 EDT, the "Repeat On" day in the Kronolith > meeting invite interface needs to be selected as "Tuesday" in order > for other calendar applications to process it as a Monday at 23:00 > EDT repeating meeting. > > To fix this, the BYDAY needs to be adjusted to UTC instead of > remaining the day in the origin timezone.
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