Fiddlefarter I know how you feel. Years ago (I'm retired now) I worked for Krispy Kreme in Nashville and had to be at work at 1 am. I usually worked to 2 or 3 in the afternoon. It took forever to get used to it. I'd have to get up at midnight.
Usually I hit the sack at 5 to 6pm. I bought black-out curtains for the windows. That helped. Disconnect the phone. That was a must. It took a couple of weeks, but finally I got used to it, but for those two weeks it was sleepless days and tired mornings.
Eight months later, though, I'd had enough. No more free donuts for me.