I once played a game called
Cythera, an old Mac shareware game modelled after the Ultimas (especially U7, with which it shares a very similar visual style). Shopkeepers in a city would go to the market in the day and close down during the night, buildings would be locked and unlocked depending on the time of day, the students in the school of mages would eat at mealtimes between classes and sleep in their dorm beds at night, nobles would hold court during the day and spend their evenings in their quarters/study, etc. Excellent game.
