I am currently playing my game with no mods. I am trying to reproduce this mod-free but it takes a lot of time if my theory is correct. I hit the bug in my Midnight Hollow game after more than 12 game weeks of play.
/edit to add: Cyron. It my have something to do with travelling to subhoods. I am assuming that traveling to the future uses the same code as traveling to University or a WA world. If you are hopping back and forth in time that gives the game a lot of opportunities to mess up the game clock in one of those transitions between the world and the subhood.