BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20071004T173000
DTEND:20071004T193000
RRULE:FREQ=MONTHLY;INTERVAL=1;UNTIL=20140519;BYDAY=1TH
SUMMARY:Sierra Club Gathering
END:VEVENT
END:VCALENDAR