It's hot as h*ll here, so I normally sleep in the daytime. That is because the little ac in the bedroom is cheaper than the big ac in the computer room. Also because I have always preferred to sleep in the daytime and work at night. but since i retired, I can't reliably follow any particular schedule.
I've never needed a lot of sleep, so I'm always awake during odd hours. My wife started working nights some time back, so both of us awake after midnight is almost every night now.