Now I get it to work. Datetime formats where wrong. iCalendar.org validator did not detect these problems. I find this errors using severinghaus.org validator here:. It is based on same iCal4j library.
Exception recurring event not picked up
I have a recurring event with exceptions (see end of message). The exceptions are picked up by Lightning (Thunderbird) and Infcloud (web-based calendar application). They are not picked up by DAVdroid. Namely, the two Calendar apps I tried (aCalendar+ and Stock Android) ignore the exceptions.
I am using DAVdroid 0.8.4.1 from the play store on a Samsung Galaxy S3 Mini Duos with Android 5.1.1 (Cyanogenmod 12.1).
I have read the Recurring Events FAQ, and based on the mention
Exceptions of recurring events are supported since DAVdroid 0.7.3.
and the fact that the event seems relatively simple, I would have thought this would be supported. (Clearly not.) Is this unsupported or a bug. In case of the former, what is problematic about this VEVENT?
BEGIN:VCALENDAR PRODID:-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN VERSION:2.0 BEGIN:VTIMEZONE TZID:Europe/Brussels BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:19700329T020000 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:19701025T030000 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 END:STANDARD END:VTIMEZONE BEGIN:VEVENT CREATED:20151012T085039Z LAST-MODIFIED:20151012T134529Z DTSTAMP:20151012T134529Z UID:06acb64a-61d4-416e-8c81-e3b4d64cb79f SUMMARY:Meeting with somebody RRULE:FREQ=WEEKLY;UNTIL=20151117T130000Z EXDATE:20151008T100000Z EXDATE:20151008T120000Z EXDATE:20151015T120000Z EXDATE:20151022T120000Z DTSTART;TZID=Europe/Brussels:20150917T140000 DTEND;TZID=Europe/Brussels:20150917T163000 SEQUENCE:3 X-MOZ-GENERATION:3 END:VEVENT END:VCALENDAR