Board Game Arena

How can I change my timeline? I assume it is based on the country you filled in? For me, I live several months acteur in different countries and therefore in different timelines.

As far as I can tell, you can only set your flag (which may or may not correlate with the timezone you're in; plenty of people show a flag for a country they don't live in.)

I'd expect your timezone is as determined by the device you are using. If a game has particular hours of play (i.e. when the clock is running vs. when it isn't), they should be displayed in your device's set timezone and other people should see it in their device's timezone.

Sidebar: even if their flag is set correctly, it doesn't always tell you their timezone. Russia and France have more than ten timezones each, with some of them 10-12 hours apart.

If you mean the timezone for the forum, which is different from the one for the rest of BGA, click on your small avatar+username below the search box on the top right corner, next to "Notifications Private messages". Then in the "Board preferences" tab you can choose a timezone: https://boardgamearena.com/forum/ucp.php?i=173