In the Navy, working on airplanes, the "night check" works until: the planes are fixed, they run out of parts, or "day check" shows up for work again. Sometimes, that's twelve hours. Sometimes, that's four hours.

I had a college job in the courier office of a bank were I worked from 1:30 p.m. to 10:00 p.m. I had a two hour route, and then I'd gas the vehicles, check the oil and coolant, and park them in the order in which they left the next day. That last thing was hard, because they crammed 15 vehicles into a parking lot designed for seven. At 8:30 p.m., I'd drive to the airport to meet an airplane that'd pick up a bag of checks.

I was so organized that I had all the cars parked, gassed, oiled, and watered by 6:30 p.m. So, I had a two hour dinner/nap before heading to the airport. When I got fired, they replaced me with two people.