BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//gyrobase/iCalendar//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20130425
RRULE:FREQ=WEEKLY;INTERVAL=1;UNTIL=20130616;BYDAY=FR,SA,SU,TH
SUMMARY:"Red"
END:VEVENT
END:VCALENDAR