@joe sod
Yes, plenty of nights. Years of doing 4 days on, 4 off, 4 nights etc. Then switched to 2 days, 2 nights, 4 off.
Don't get me wrong, I'm not complaining about the shift work. I mainly enjoyed it. It meant working a lot of weekends, but I'm fine with that, as I preferred the time off in the week. But on that sort of pattern, your life is kind of dominated by the clock, and in my case, by 8pm or 8am in particular.
So these days, I don't take much notice of the time, or even the day. There are things I make sure I do each day, so I guess there's a kind of structure. But they get done at random times.
You know that period between Christmas and new year, when you hear people saying they don't know what day it is. Well my life is like that all the time.