BG 1&2 both had Dynamic day/night system with a dedicated cut scene sunset /sunrise for each area you were in. When you selected a character with infravison you could tell, everything glowed red. If you were given a quest or asked to meet someone at night you had 2-3 hours in real time to explore/ rest up or otherwise kill time. Only certain NPC’s would come out at night. I remember the first time getting to Beregost and seeing courtesans outside of Feldpot's inn. They weren’t there during the day. The inns and homes would have several beds with people sleeping at night. Shops would be empty, the undead would roam.
