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:VEVENT
DTSTART:20200406T221300
DURATION:PT0H15M0S
SUMMARY:Invalid STATUS
STATUS:confirmed
END:VEVENT
BEGIN:VEVENT
DTSTART:20200406T221300
DURATION:PT0H15M0S
SUMMARY:LOCATION twice
LOCATION:first
LOCATION:second
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200406
DURATION:PT0H15M0S
SUMMARY:Invalid duration (must be days or weeks)
END:VEVENT
BEGIN:VEVENT
DTSTART:20200406
DURATION:P1D
SUMMARY:Invalid DTSTART value type
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200406
SUMMARY:Invalid DTEND value type
DTEND:20200407
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200406
DURATION:P1D
RRULE:FREQ=MONTHLY;UNTIL=20201030T120000Z
SUMMARY:Invalid UNTIL value
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200406
DURATION:P1D
RRULE:FREQ=MONTHLY;UNTIL=20201030
EXDATE:20200606
SUMMARY:Invalid EXDATE value type
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200406
DURATION:P1D
RRULE:FREQ=MONTHLY;UNTIL=20201030
EXDATE;VALUE=DATE:20200606T120000Z
SUMMARY:Invalid EXDATE value
END:VEVENT
BEGIN:VEVENT
DTSTART:20200527T163000
DTEND:20200528T163000
DURATION:P1D
SUMMARY:Both end time and duration
END:VEVENT
BEGIN:VEVENT
DTSTART:20200527T163000
DTEND:20200526T163000
SUMMARY:End time before start
END:VEVENT
BEGIN:VTODO
SUMMARY:finally\, missing end of item
END:VCALENDAR