BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//FamilySync//Test//EN
BEGIN:VTIMEZONE
TZID:America/Toronto
BEGIN:STANDARD
DTSTART:19701101T020000
RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:19700308T020000
RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:single-duration-only@familysync.test
DTSTART;TZID=America/Toronto:20260618T080000
DURATION:PT1H
SUMMARY:Morning Standup
DESCRIPTION:Non-recurring timed event with DURATION only, no DTEND
END:VEVENT
END:VCALENDAR