BEGIN:VCALENDAR
PRODID:-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN
VERSION:2.0
BEGIN:VEVENT
SUMMARY:Event One
DTSTART:20190101T150000
DTEND:20190101T160000
END:VEVENT
BEGIN:VEVENT
SUMMARY:Event Four
DTSTART:20190101T180000
DTEND:20190101T190000
END:VEVENT
BEGIN:VEVENT
SUMMARY:Event Three
DTSTART:20190101T170000
DTEND:20190101T180000
END:VEVENT
BEGIN:VEVENT
SUMMARY:Event Two
DTSTART:20190101T160000
DTEND:20190101T170000
END:VEVENT
END:VCALENDAR