The residence room that I’m working out of this month has air conditioning. It’s not under my conscious control; apparently, the AC is on during the daytime and off at nights.
I can see the logic here: the sun’s out in the daytime, and the sun is known for its ability to make things hotter. Hence, the AC is really only needed when it’s countering the evil thermal force of sunlight. Or something.
Unfortunately, this is more or less the opposite of what I personally would like to happen. I can deal with elevated room temperatures during the day, but at night I really prefer to have the air around me be cool if not cold. (I remember one apartment I lived in where the heater worked very well indeed, to the point that I would open my window in February and let my room’s temperature drop to near zero (Centigrade) so that I could get comfortable.)