BEGIN:VCALENDAR
PRODID:-//Emacs//NONSGML icalendar.el//EN
VERSION:2.0
BEGIN:VEVENT
SUMMARY:rrule count bi-weekly 3 times
DTSTART;VALUE=DATE-TIME:20030919T090000
DTEND;VALUE=DATE-TIME:20030919T113000
RRULE:FREQ=WEEKLY;COUNT=3;INTERVAL=2
END:VEVENT
END:VCALENDAR