Administrating calendar events
This system supports a limited subset of iCalendar and CalDAV standards,
and is tested to work with Apple and Mozilla clients.
The CalDAV service uses Radicale.
Recurrences
Recurring events can be too complex to handle for some CalDAV applications.
Recurrence rules are stored in iCalendar field RRULES.
Locating which events may be cause of problem is tricky,
because recurrence rules may exist not only directly tied to the event
but also embedded in timezone objects for the event
(which is commonly not problematic for applications).
Quick'n'dirty locating events containing recurrence rules,
except (most likely) summertime rules:
grep -rP 'RRULE:FREQ=(?!YEARLY(;UNTIL=19430919T000000Z)?;(BYMONTH=(2|3|4|9|10|11);BYDAY=(-1|1|2|3)SU|BYDAY=(-1|1|2|3)SU;BYMONTH=(2|3|4|9|10|11)))'
Scheduling
Scheduling of events is currently not processed -
invitation and FreeBusy/Availability hints are ignored.
Calendaring applications may request invitations for events,
but this is currently ignored in the CalDAV service
(technically this is CalDAV extensions iTIP and iMIP).
Calendaring applications may query for FreeBusy or Availability of resources,
but this is currently rejected by the CalDAV service
(technically this may involve CalDAV extensions VFREEBUSY or VAVAILABILITY).
