BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20130407T190000
RRULE:FREQ=WEEKLY;INTERVAL=1;UNTIL=20140523;BYDAY=SU
SUMMARY:Diabolical Experiments
END:VEVENT
END:VCALENDAR