BEGIN:VCALENDAR
BEGIN:VEVENT
DTSTART:20130803T190000Z
DTEND:20130803T210000Z
SUMMARY:This is an event
END:VEVENT
BEGIN:VEVENT
DTSTART:20130803T190000Z
DTEND:20130803T210000Z
SUMMARY:This event is almost the same event
END:VEVENT
BEGIN:VEVENT
DTSTART:20130803T190000Z
DTEND:20130803T220000Z
SUMMARY:This event is a little longer but starts at the same time
END:VEVENT
END:VCALENDAR