BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//uttek//Mail & Kalender//DE
CALSCALE:GREGORIAN
BEGIN:VEVENT
UID:af709b002401be9a@demo.example
DTSTAMP:20261102T234810Z
DTSTART;VALUE=DATE:20261126
DTEND;VALUE=DATE:20261127
SUMMARY:Geburtstag Tobias
RRULE:FREQ=YEARLY
END:VEVENT
END:VCALENDAR