BEGIN:VCALENDAR
VERSION:2.0
PRODID:spatie/icalendar-generator
BEGIN:VTIMEZONE
TZID:UTC
BEGIN:STANDARD
DTSTART:20251215T214122
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:6aa475820bdf5
DTSTAMP:20260911T214122Z
SUMMARY:Istanbul
DTSTART:20270506T170000Z
DTEND:20270506T170000Z
END:VEVENT
END:VCALENDAR