BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20121207T180000
DTEND:20121207T220000
RRULE:FREQ=WEEKLY;INTERVAL=1;UNTIL=20140518;BYDAY=FR
SUMMARY:May at Plenum Space
END:VEVENT
END:VCALENDAR