BEGIN:VCALENDAR
VERSION:2.0
PRODID:spatie/icalendar-generator
BEGIN:VTIMEZONE
TZID:UTC
BEGIN:STANDARD
DTSTART:20250911T151409
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
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BEGIN:VEVENT
UID:6a26dc4196128
DTSTAMP:20260608T151409Z
SUMMARY:Leonardo da Vinci – Erfindungen erleben
DTSTART:20261230T100000Z
DTEND:20261230T100000Z
END:VEVENT
END:VCALENDAR