SUMMARY: Testing legacy `icalendar-import-format' function
 DESCRIPTION: described
 CLASS: private
 LOCATION: somewhere
 ORGANIZER: mailto:baz@example.com
 STATUS: CONFIRMED
 URL: http://example.com/foo/baz
 UID: some-unique-id-here
 DTSTART: 20250919T090000
 DTEND: 20250919T113000