Night time is quiet, no loud talking downstairs, no annoying kids yelling outside, mostly no sirens, less cars = less noise, good time to calm down and think about stuff… stuff like weird philosophical questions and questioning if reality is real, also browsing the web in silence, looking for my next [youtube video / film / tv / anime] to watch.
It’s like 6:30 AM here lolz.
I was in the Navy and I can corroborate this. I’ll add to it that a lot of our teachers at A school were O-1 to O-3 (Ensign to Lieutenant) and they were pretty cool. We used to mess with them from time to time when they left the building by lining up and making them salute all the way to the parking lot. They were good sports.