Hi @Antti,
It seems that the calendar in Forum does not swap from summer time to winter time correctly if the event has been done before the swap. Also, the forum still presents Helsinki time zone as +3.00 which is summer time (I guess).
Regards, Anna
I think this is because the UTC time this forum software uses. UTC does not support daylight saving time and because of this Helsinki for example is displayed as +3.00. Not sure if there is anything at the moment we could do for this but we’ll inspect this.