I have this bug as well. I was bummed out because it takes me out of the immersion but to hear it might actually effect gameplay later on really makes me consider putting down the game until this patch comes out.
Is this even the sort of thing that can be undone or will my game forever be in the year 10,000? Extremely disappointed if that's the case. Is there any way to edit an ini file or text somewhere wherever the journal is stored so I can fix this myself?
I hope the devs can check if days >365 and set all instances in year in the journal to 2823 if it isn't. I'm no expert though.
Save game and output is here: http://www.sendspace.com/filegroup/zWWPeAWU3U8zHoZyB%2B9Y%2Fg