BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
UID:event_rrule_recurrence_id
SUMMARY:Arbeit
RECURRENCE-ID:20140707T050000Z
DTSTART;TZID=Europe/Berlin:20140707T090000
DTEND;TZID=Europe/Berlin:20140707T140000
END:VEVENT
BEGIN:VEVENT
UID:date123
DTSTART;VALUE=DATE:20130301
DTEND;VALUE=DATE:20130302
RRULE:FREQ=MONTHLY;INTERVAL=2;COUNT=6
SUMMARY:Event with Ümläutß
END:VEVENT
BEGIN:VEVENT
UID:event_rrule_recurrence_id
SUMMARY:Arbeit
RRULE:FREQ=WEEKLY;UNTIL=20140806T060000Z
DTSTART;TZID=Europe/Berlin:20140630T070000
DTEND;TZID=Europe/Berlin:20140630T120000
END:VEVENT
END:VCALENDAR