BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20080811T090000
RRULE:FREQ=WEEKLY;INTERVAL=1;UNTIL=20140525;BYDAY=MO
SUMMARY:The Nature Circle
END:VEVENT
END:VCALENDAR