BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
DTSTART:20111205T180000
DTEND:20111205T210000
SUMMARY:personal] busy
END:VEVENT
BEGIN:VEVENT
DTSTART:20111219T180000
DTEND:20111219T210000
SUMMARY:personal] busy
END:VEVENT
END:VCALENDAR