BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20090818T100000
DTEND:20090818T200000
RRULE:FREQ=MONTHLY;INTERVAL=1;UNTIL=20140521;BYDAY=3TU
SUMMARY:Public Free Day
END:VEVENT
END:VCALENDAR