If you aren't fully exiting the game, the simulation doesn't run. You're essentially just pausing it if you leave your Xbox on standby. That looks like what the problem is. You need to fully log out and give it enough time before logging back in for the simulation to run. If you don't wait enough time, it's like you haven't logged out. The simulation has events that specifically deal with this issue, but only if you are logged out long enough for it to run. When you come back after the simulation has run, you get the "end of day" event in the journal. If you don't see that, then you probably didn't log out right or give it enough time.