BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20121101T100000
RRULE:FREQ=WEEKLY;INTERVAL=1;UNTIL=20140526;BYDAY=TH
SUMMARY:T'ai Chi
END:VEVENT
END:VCALENDAR