As the title says, my game must really hate the holidays, since every December 31st, 949, the moment is going to autosave, it just closes the game. I have no mods installed (with the exception of making all the songs play with no restrictions). And while there's a war going on, I had cases were the war concluded before New Year, and still crashed, so I'm out of ideas what could be causing it. I'll leave below a link to the save and a dxdiag log. (Please don't tell me the save has been corrupted 
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https://www.dropbox.com/s/3ypackqxooh6lmq/Ironman_Venice.ck2?dl=0
)https://www.dropbox.com/s/3ypackqxooh6lmq/Ironman_Venice.ck2?dl=0