NPC or POI based schedules

Along with tracking the time via a variable, it would be cool if you could assign a schedule to NPCs or a POI. I’m sure this is self explanatory. But having NPCs able to move around the map on a schedule would be pretty immersive. It would only need to be checked when you enter a POI, it would look up who is supposed to be there at the current time and move them if necessary.