BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20111024
RRULE:FREQ=MONTHLY;INTERVAL=1;UNTIL=20140521;BYDAY=4MO
SUMMARY:Spanish book group
END:VEVENT
END:VCALENDAR