BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20101221T120000
DTEND:20101222T030000
RRULE:FREQ=WEEKLY;INTERVAL=1;UNTIL=20140525;BYDAY=TU
SUMMARY:$2 Tuesdays
END:VEVENT
END:VCALENDAR