Message log also contains timestamps at end of each message.Current Game Time: Wed 2022-04-06 14:43:06
Last Action Point Tick was at 2022-04-06 14:30:07
Unfortunately all these timestamps are ambiguous because they do not contain any timezone information.
It was confirmed a few times on chat that game engine uses GMT, but I think it would be nice to also display that information directly in interface. It could be either extending code to add timezone code to each and every timestamp, or simply add a line like "Displayed timestamps are in GMT timezone" to the footer.