BEGIN:VCALENDAR
PRODID:-//some random cal software//EN
VERSION:2.0
BEGIN:VEVENT
CREATED:20130102T120000Z
LAST-MODIFIED:20130102T120000Z
DTSTAMP:20130102T120000Z
UID:f106ecdf-c716-43ef-9d94-4e6f19f2fcfb
SUMMARY:a test cal file
DTSTART;VALUE=DATE:20130101
DTEND;VALUE=DATE:20130102
END:VEVENT
END:VCALENDAR