BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
BEGIN:VEVENT
DTSTAMP:20260405T074656Z
UID:fa0c3193-b045-4cbe-8512-c0c733b095d6
DTSTART;VALUE=DATE:20231101
DTEND;VALUE=DATE:20231102
SUMMARY:Room 10 last swim 
END:VEVENT
END:VCALENDAR