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10/19/25
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Comment on [#12843] Wrong timezone calculation with CalDAV
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> I have the same problem. > I'm syncing with android CalDAV and Thunderbird/Lightning over CalDAV > to Horde via HTTPS. > The timezone of my Horde Calendar and my Devices are Asia/Kathmandu > > If I create a new event in my local timezone everething is fine. > If I create a new event in a foreigh timezone with the web interface > everething is also fine. > But If I create in Thunderbird/Android an event in the foreign > timezone I get it back with the foreign timezone but the time is set > to what should be in my local timezone. > E.g. if I create a event for 8:00 in Europe/Berlin I get it back as > 12:45 Europe/Berlin and 17:30 Asia/Kathmandu but it should be 12:45 > Asia/Kathmandu > > I'm using horde 5.1.1 > > An other user wrote about that same problem on the mailing list: > http://horde.690.n7.nabble.com/Timezone-change-after-synchronize-event-from-evolution-tt119034.html#none > >> I'm sorry, there is really a problem as you can see bellow. >> Can you please tell me how the timezone parsing is done in Horde when >> importing ICS data ? >> >> Did Horde use TZID and/or X-LIC-LOCATION line or use only DTSTART/DTEND ? >> >> As you can see bellow, when timezone in TZID and X-LIC-LOCATION lines >> are different than timezone in DTSTART and DTEND lines it works. >> >> ---> >> BEGIN:VCALENDAR >> VERSION:2.0 >> PRODID:-//dmfs.org//mimedir.icalendar//EN >> BEGIN:VTIMEZONE >> TZID:Europe/Berlin >> X-LIC-LOCATION:Europe/Berlin >> BEGIN:DAYLIGHT >> TZOFFSETFROM:+0100 >> TZOFFSETTO:+0200 >> TZNAME:CEST >> DTSTART:19700329T020000 >> RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU >> END:DAYLIGHT >> BEGIN:STANDARD >> TZOFFSETFROM:+0200 >> TZOFFSETTO:+0100 >> TZNAME:CET >> DTSTART:19701025T030000 >> RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU >> END:STANDARD >> END:VTIMEZONE >> BEGIN:VEVENT >> DTSTART;TZID=Europe/Berlin:20131119T180000 >> DESCRIPTION:Some Description >> SUMMARY:CalDAV-Sync Test Event >> LOCATION:Some Location >> TRANSP:OPAQUE >> STATUS:CONFIRMED >> DTEND;TZID=Europe/Berlin:20131119T190000 >> LAST-MODIFIED:20131118T133721Z >> DTSTAMP:20131118T133721Z >> CREATED:20131118T133721Z >> UID:d9efd40a-39b5-4d62-9129-83ff649fa1a8 >> BEGIN:VALARM >> TRIGGER;VALUE=DURATION:-PT10M >> ACTION:DISPLAY >> DESCRIPTION:Default Event Notification >> X-WR-ALARMUID:45da49a7-9941-4ff9-8b27-b45c5c4c4c39 >> END:VALARM >> END:VEVENT >> END:VCALENDAR >> ---> >> >> Show: >> >> Event title: CalDAV-Sync Test Event >> From 11/19/2013 17:00 to 11/19/2013 17:59 Timezone: Europe/Berlin >> => The date is converted but there is no reason to convert it as in >> the ics file there is: >> DTSTART;TZID=Europe/Berlin:20131119T180000 >> DTEND;TZID=Europe/Berlin:20131119T190000 >> >> >> Now, just do the following modification in the ICS file: >> -DTSTART;TZID=Europe/Berlin:20131119T180000 >> +DTSTART;TZID=Europe/Paris:20131119T180000 >> -DTEND;TZID=Europe/Berlin:20131119T190000 >> +DTEND;TZID=Europe/Paris:20131119T190000 >> >> (and so keep Europe/Berlin for TZID and X-LIC-LOCATION.) >> >> ---> >> BEGIN:VCALENDAR >> VERSION:2.0 >> PRODID:-//dmfs.org//mimedir.icalendar//EN >> BEGIN:VTIMEZONE >> TZID:Europe/Berlin >> X-LIC-LOCATION:Europe/Berlin >> BEGIN:DAYLIGHT >> TZOFFSETFROM:+0100 >> TZOFFSETTO:+0200 >> TZNAME:CEST >> DTSTART:19700329T020000 >> RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU >> END:DAYLIGHT >> BEGIN:STANDARD >> TZOFFSETFROM:+0200 >> TZOFFSETTO:+0100 >> TZNAME:CET >> DTSTART:19701025T030000 >> RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU >> END:STANDARD >> END:VTIMEZONE >> BEGIN:VEVENT >> DTSTART;TZID=Europe/Paris:20131119T180000 >> DESCRIPTION:Some Description >> SUMMARY:CalDAV-Sync Test Event >> LOCATION:Some Location >> TRANSP:OPAQUE >> STATUS:CONFIRMED >> DTEND;TZID=Europe/Paris:20131119T190000 >> LAST-MODIFIED:20131118T133721Z >> DTSTAMP:20131118T133721Z >> CREATED:20131118T133721Z >> UID:d9efd40a-39b5-4d62-9129-83ff649fa1a8 >> BEGIN:VALARM >> TRIGGER;VALUE=DURATION:-PT10M >> ACTION:DISPLAY >> DESCRIPTION:Default Event Notification >> X-WR-ALARMUID:45da49a7-9941-4ff9-8b27-b45c5c4c4c39 >> END:VALARM >> END:VEVENT >> END:VCALENDAR >> ---> >> >> Show: >> >> Event title: CalDAV-Sync Test Event >> From 11/19/2013 18:00 to 11/19/2013 18:59 Timezone: Europe/Paris >> >> Of course, i have tried this two imports tests multiple times for be >> sure of the result. >
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