[2023] Game minimizes, shrinks to small resolution, then crashes on exact date.

Yes, unfortunately that other user stopped responding for some reason, so unresolved.

You say your symptoms are identical, but they reported the problem happened after 15 minutes of play, not on a given date. Which is why I asked for temperatures.

Beyond Disbelief said: I have no idea if the AI is supposed to make a decision/take action on that date that might be causing the conflict. I'm not familiar with how the save file keeps track of AI turns or planned invasion dates.

I don't play or develop this game, so I don't know any of that either I'm afraid.

Beyond Disbelief said: Everytime I load the game it crashes exactly on 2230.12.05

Is that just one particular galaxy, or any one you play now?  

If this save is unmodded, it is almost certainly a bug - best to make a new thread in Bug Reports and attach it there.

If you are after help in editing that bug out of the save, ironically User Mods is probably your best bet!