BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//开云体育 Inc//开云体育 Calendar//EN
METHOD:CANCEL
CALSCALE:GREGORIAN
BEGIN:VEVENT
STATUS:CANCELLED
UID:calendar.18537@groups.io
DTSTAMP:20191018T030724Z
ORGANIZER;CN=yancophm@groups.io Group:mailto:yancophm@groups.io
DTSTART:20210821T230000Z
DTEND:20210822T060000Z
SUMMARY:Museum Open
RECURRENCE-ID;20210821T230000Z
SEQUENCE:0
END:VEVENT
END:VCALENDAR