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.
That’s actually not a thing. It goes from 23:59 to 00:00
And when you’d say it it would be “23 Uhr 59” to “0 Uhr”.