I work in an international company too! And yet, this confusion persists :-/
I also format everything YYYY-MM-DD for my personal use too. When writing prose, usually some other format is just fine, but I really would love if everyone did year-month-day
Agreed. I’ve never understood the logic of splitting the hours of the day in half. 1800 is so much nicer than 6PM.
I don’t think that’s purely an American thing though. If I had to guess, I’d say that most of the world uses 12-hour clocks instead of 24-hours. I could be wrong though. Nevertheless, I usually write all times in 24-hour format. But it always sounds awkward trying to use it in speech. I haven’t figured out a good way to do that yet.