BEGIN:VCALENDAR
PRODID:-//Test//
VERSION:2.0
BEGIN:VEVENT
UID:d2240999-ab22-410e-97e9-8f562cb87d10
SUMMARY:T10
DESCRIPTION:with VALUE=DATE-TIME and format is yyyymmdd. without Z/TZID/VTIMEZONE
DTSTART;VALUE=DATE-TIME:20151103
DTEND;VALUE=DATE-TIME:20151104
END:VEVENT
END:VCALENDAR