To avoid confusion with the starting time, could you please make use of the Insert date/time feature of Discourse (click the little calendar icon in the formatting bar)? Europe doesn’t observe daylight saving time right now fi (so it should probably be CET, not CEST).
It will automatically show the time in a nr of time zones (including the one the browser is configured for I believe).
Example: [date=2020-02-21 time=14:00:00 timezone="UTC" timezones="PST8PDT|Japan"] (renders as: 2020-02-21T14:00:00Z).