Tickets :: Comment on [#9726] Issues when synchronizing repeated events spanning DST change date

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Comment	> Here is an example of a repeated event as it is send out by Horde > when synchonizing over SyncML (set to repeat on Monday, 8pm from Feb > 28th to May, 3rd): > > BEGIN:VCALENDAR > VERSION:2.0 > X-WR-CALNAME:gerti's Calendar > PRODID:-//The Horde Project//Horde_iCalendar > Library\, Horde 3.3.8//EN > METHOD:PUBLISH > BEGIN:VEVENT > DTSTART:20110301T010000Z > DTEND:20110301T020000Z > DTSTAMP:20110327T142133Z > CREATED:20110327T142029Z > LAST-MODIFIED:20110327T142029Z > SUMMARY:Repeating One > ORGANIZER;CN=gerti:mailto:gerti > CLASS:PUBLIC > STATUS:CONFIRMED > TRANSP:OPAQUE > RRULE:FREQ=WEEKLY;INTERVAL=1;BYDAY=MO;UNTIL=20110505T035959Z > EXDATE:20110328T000000Z > EXDATE:20110328T000000Z > END:VEVENT > END:VCALENDAR > > The Synthesis Android SyncML client is not able to handle this. Upon > reporting this as a bug there, I was told that the problem is with > horde. Specifically, > > 1) The Horde server is sending VCALENDAR 2.0 format, though it does > not offer this format. The Synthesis client is accepting this > (because it's clear what the server is intending to do), but it's not > really according the SyncML standard. The Horde server should offer > VCALENDAR 2.0. > > 2) The Horde server is sending it as UTC without any timezone information. > That works for single events, but not for repeating events over the > DST change date. > The Android client stores it locally in UTC timezone (without any DST rule). > The Horde server should send the VCALENDAR information for the given > timezone. > > 3) The event is on Tuesday according to the given information, not on > Monday (as written in the RRULE) > It would be Monday in the local time zone, but no such information is sent. > > 4) The Horde server is not sending a UID, that's why the Synthesis > client will add one and send it > back with the next sync. That's why the client sends back even > without any changes. > > 5) For sending back the Horde server does not allow UTC (and only > VCALENDAR 1.0), that's why the Synthesis is sending back the events > in floating format as VCALENDAR 1.0 which has several limitations for > EXDATES. > > 6) The Horde server is sending two times the same EXDATE which is not > correct. > This has no negative effect on client's side, but it's not ok that way. > > > Let me know if there is anything I can do to help getting this > resolved. Tested Horde version is 3.3.8, kronolith 2.3.4. >
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