[ARCHIVED] In-game clock not matching gameplay (1.68/1.33)

I've had something similar happen before and I noticed it to be when I had been using the 'ultra speed' fast forward pretty frequently. It hasn't happened to me for a while but it would make the time that the game thought it was different to the time that the clock showed, sometimes only by a few minutes, sometimes by hours. I usually solved it by saving to manage worlds and then reloading the household and everything would catch up and sort itself out but it would often happen again quite soon after. Like I say, its not happened for a while but I thought I'd add this as it might help!