BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
DTSTART:20200318T084100
DURATION:PT1H30M0S
SUMMARY:A simple appointment
END:VEVENT
BEGIN:VTODO
PRIORITY:1
SUMMARY:A simple todo
END:VTODO
BEGIN:VEVENT
DTSTART:
DURATION:PT1H30M0S
SUMMARY:missing start time
END:VEVENT
BEGIN:VEVENT
DTSTART:20200318T084100
DURATION:PT1H30M0S
RRULE:FREQ=HOURLY;INTERVAL=2;UNTIL=20200401T000000
SUMMARY:unsupported frequency
END:VEVENT
BEGIN:VEVENT
DTSTART:20200318T084100
DURATION:PT1H30M0S
SUMMARY malformed summary line
END:VEVENT
BEGIN:VTODO
PRIORITY:10
SUMMARY:invalid priority
END:VTODO
BEGIN:VEVENT
DTSTART:20200318T084100
DURATION:PT1H30M0S
RRULE:FREQ=DAILY;INTERVAL=2;UNTIL=20200401T000000
EXDATE 20200324T084100
SUMMARY:malformed exceptions line
END:VEVENT
BEGIN:VEVENT
DTSTART:20200318T084100
DURATION:PT1H30M0S
SUMMARY:Summary with more than\none line
END:VEVENT
BEGIN:VEVENT
DTSTART:20200318T084100
DURATION:PT1H30M0S
SUMMARY:malformed description line
DESCRIPTION something is missing
END:VEVENT
BEGIN:VEVENT
DTSTART:20200318T084100
DURATION:PT1H30M0S
SUMMARY:malformed description
DESCRIPTION:description with an unescaped semicolon (;)
END:VEVENT
BEGIN:VEVENT
DTSTART:20200318T084100
DURATION:PT1H30M0S
SUMMARY:empty DESCRIPTION
DESCRIPTION:
END:VEVENT
BEGIN:VTODO
PRIORITY:1
SUMMARY:an unescaped comma: ,
END:VTODO
BEGIN:VTODO
SUMMARY:finally\, missing end of item
END:VCALENDAR