BEGIN:VCALENDAR
PRODID:-//Google Inc//Google Calendar 70.9054//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:xxx@gmail.com
X-WR-TIMEZONE:Europe/Zurich
BEGIN:VTIMEZONE
TZID:Etc/UTC
X-LIC-LOCATION:Etc/UTC
BEGIN:STANDARD
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:GMT
DTSTART:19700101T00000--äüüßßß-0
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20210325
DTEND;VALUE=DATE:20210326
RRULE:FREQ=YEARLY;WKST=MO;INTERVAL=1
DTSTAMP:20210421T154106Z
UID:zzz@google.com
REATED:20200831T200244Z
DESCRIPTION:
LAST-MODIFIED:20200831T200244Z
LOCATION:
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:Birthday
TRANSP:OPAQUE
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ACTION:DISPLAY
DESCRIPTION:This is an event reminder
TRIGGER:-P0DT7H0M0S
END:VALARM
END:VEVENT