BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20110430T100000
DTEND:20110430T130000
RRULE:FREQ=WEEKLY;INTERVAL=1;UNTIL=20140518;BYDAY=SA
SUMMARY:Windsurfing Lessons
END:VEVENT
END:VCALENDAR