BEGIN:VCALENDAR
DESCRIPTION:We leave the timezones out but we use common names so that they are added.
BEGIN:VEVENT
DTSTART;TZID=America/New_York;VALUE=DATE-TIME:20140829T080000
DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20140829T080000
RDATE;VALUE=PERIOD;TZID=Europe/Berlin:20240913T120000/PT2H
SUMMARY:an event with a custom tz name
END:VEVENT
BEGIN:VEVENT
RECURRENCE-ID;TZID=Europe/Moscow:20190309T020000
END:VEVENT
BEGIN:VTODO
DUE;TZID=Asia/Singapore;VALUE=DATE-TIME:20140829T080000
END:VTODO
BEGIN:VEVENT
RDATE;TZID=Mexico/General:20190309T020000
RDATE;TZID=America/Noronha:20190309T020000
DTSTAMP:19920901T130000Z
END:VEVENT
END:VCALENDAR