I wonder if anybody else has seen this, and if anybody knows of a way to fix it. I am now on my second fort where the date changes upon unpausing the game after load. I saved and exited the game on 26th timber, late autumn. The dwarven caravan had just arrived and things were fine. When I load that save, the date is still 26th Timber. When I unpause the game however, the world experiences some weird kind of temporal anomaly, and the date changes to 1st Sandstone, mid-autumn. Even more strange, my military schedule screen has Moonstone highlighted as the current month. This is causing all kinds of weird problems, like frozen lakes/rivers all of a sudden unfreezing, and my military seems to refuse to do anything, possibly because they don't know what date it is.
Any thoughts on this? I loaded my Autumn autosave, 1st limestone is the date and it stays that way when I unpause. The military screen has Sandstone highlighted as current though, which is still weird.