I mean, do they say “I sleep at 9pm” or more like “I sleep at 2100 hrs” even while they are talking informally? 2100 hrs sounds very formal to me, but yeah, I was just wondering if they used 24 hour format for only official and government proceedings and used 12 hour format for casual stuff.
In text Comms I use the 24h format but since I was a kid I learned to read the 24h in 12h format. I mean if I check the clock and it’s 18:00 I won’t think “it’s 18 o’clock” but “it’s 6 o’clock”