Math Memes

As is so often the case, wikipedia has a helpful map https://en.wikipedia.org/wiki/24-hour_clock#/media/File:12_24_Hours_World_Map.svg

For all of exclusively 12 hour, exclusively 24 hour, 24 hour in writing but 12 hour in speech, and just using both at random, there are entire regions of the world using that system

I think it's a US thing.

I use 12h clock when context provides the am/ap variation, 24h otherwise. I have had americans tell me I sound militaristic when I tell them my flight lands at "seventeen fifteen ". I guess they are right, the NATO format for time uses 24h clock.

Haha

Remember me when you learn this about the metric system