BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20130621
RRULE:FREQ=WEEKLY;INTERVAL=1;UNTIL=20130723;BYDAY=FR,SA,SU
SUMMARY:"Twelfth Night"
END:VEVENT
END:VCALENDAR