BEGIN:VEVENT
DTSTART;TZID=Europe/Vienna:20120327T100000
DTEND;TZID=Europe/Vienna:20120327T180000
RRULE:FREQ=WEEKLY;UNTIL=20120703T080000Z;BYDAY=TU
EXDATE;TZID=Europe/Vienna:20120529T100000
EXDATE;TZID=Europe/Vienna:20120403T100000
EXDATE;TZID=Europe/Vienna:20120410T100000
EXDATE;TZID=Europe/Vienna:20120501T100000
EXDATE;TZID=Europe/Vienna:20120417T100000
DTSTAMP:20130716T120638Z
SUMMARY:A Recurring event with multiple exdates, one per line.
END:VEVENT