I would like to know as well. I worked shift duty in the USAF, and currently do storm duty for the electric utility company.
I was lucky. When I was a rookie cop I did the 4x12 shift so I never did straight-up midnights. Those guys were zombies. And we’d get off work at midnight and go straight to the bars that closed at 4am, which is why everyone called it the “4x4” shift. Haha.