BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20121201T153000
DTEND:20121201T173000
RRULE:FREQ=MONTHLY;INTERVAL=1;UNTIL=20140619;BYDAY=1SA
SUMMARY:Instant Chorus
END:VEVENT
END:VCALENDAR