ical a calendar format

---

A lot of keywords exists, but only a few are needed.

BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
 
BEGIN:VEVENT
SUMMARY:Rolf LANG (1957)
RRULE:FREQ=YEARLY;INTERVAL=1;BYMONTH=7;BYMONTHDAY=21
DTSTART:19570721
END:VEVENT

END:VCALENDAR