BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//FamilySync//Test//EN
BEGIN:VEVENT
UID:birthday-annual@familysync.test
DTSTART;VALUE=DATE:20260615
RRULE:FREQ=YEARLY
SUMMARY:Birthday
DESCRIPTION:Annual birthday event - all-day, no time component
END:VEVENT
END:VCALENDAR