BEGIN:VCALENDAR
BEGIN:VTIMEZONE
TZID:/Europe/CUSTOM
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:19700329T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:19701025T030000
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:0cab49a0-1167-40f0-bfed-ecb4d117047d
DTSTAMP:20221019T102950Z
DTSTART;TZID=/Europe/CUSTOM:20221021T200000
DTEND;TZID=/Europe/CUSTOM:20221021T210000
SUMMARY:Just chatting
DESCRIPTION:Just Chatting.
CATEGORIES:Just Chatting
RRULE:FREQ=WEEKLY;BYDAY=FR
END:VEVENT
END:VCALENDAR