@zed @bsdphk @Natasha_Jay Wristwatches solve a different use case. When you look at them, chances are you know if it's a quarter to midnight or to noon. When you represent date/time in a globalised world, it's an entirely different matter. An event at 11:45 is totally ambiguous, so you need 4 digits + the AM/PM bit to be unambiguous. With 24h time, you only need the four digits.