BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//开云体育 Inc//开云体育 Calendar//EN
METHOD:PUBLISH
CALSCALE:GREGORIAN
BEGIN:VEVENT
UID:calendar.20797@groups.io
DTSTAMP:20191203T055037Z
ORGANIZER;CN=yancophm@groups.io Group:mailto:yancophm@groups.io
DTSTART:20200103
DTEND:20200104
RRULE:RRULE:FREQ=YEARLY;INTERVAL=1
SUMMARY:Museum Flat Smoke Detector Batteries
DESCRIPTION:Batteries in smoke detectors to be changed every 12 months
SEQUENCE:0
END:VEVENT
END:VCALENDAR