BEGIN:VCALENDAR
VERSION:2.0
PRODID:test
BEGIN:VFREEBUSY
UID:test-123
DTSTART:20250101T000000Z
DTEND:20250102T000000Z
FREEBUSY:20250101T100000Z/20250101T120000Z,20250101T140000Z/20250101T160000Z
END:VFREEBUSY
END:VCALENDAR