So @sotolf reminded me of something I kind of love. The Japanese "30-hour system". Used in nightlife, broadcasting, and transport, the time extends the day past midnight to keep late-night events grouped with the same calendar day. So a club open from 11PM to 1AM might list its hours as 23:00–25:00.

We should all adopt this!

Sadly Wikipedia does not have a detailed page on this system in English but here is a little longer explanation:

https://skdesu.com/en/30-hours-from/

#Japan #30HourClock #TimeTrivia

@ruari @sotolf 😎 It's disturbing to me to see 24:00 used instead of 00:00, 25:00 is even worse! 😁 (But 12pm or 12am are still the worst as they don't indicate when they are!)
@FediThing
I know that
@ruari had a trick for it, but I forgot, for some reason I internalised them as after midday and past midday, so I never know which of them are supposed to be in the morning, and which of them is in the evening :p I think am is early and pm is late, but am never 100% sure without having to look it up.

@sotolf The key bit is AM is morning and PM is after midday. If you want to know the order, one trick is just to remind yourself that alphabetically A is before P.

To know what to do with 12 itself, just remember it is actually the zero hour. So 12AM, 1AM, 2AM â€Ķ 10AM, 11AM. That is then is followed by 12PM, 1PM, 2PM â€Ķ 10PM, 11PM.

I would assume the reason we use 12 and not 0 is simply because 0 is a "relatively" new concept and timekeeping is old as fuck. ðŸĪĢ

@FediThing

@ruari @sotolf I've seen people use it in both directions to the point of meaninglessness. Some people say 12pm to mean late at night, some say 12am to mean beginning of the morning ðŸĪŠ

"Midday" and "midnight" avoid all this ambiguity, as does the 24 hour clock of course.

@FediThing @ruari Funnily enough I think of 24:00 as the end of the night and 0:00 as the beginning of the early morning :p

@sotolf

"Funnily enough I think of 24:00 as the end of the night and 0:00 as the beginning of the early morning :p"

Which is both true and also aligns with the Japanese system. 😉

@FediThing

@ruari @FediThing That is true, so at least for me the japanese system makes intuitive sense as well, but I did live in Japan 1 and a half year, so it might be that my intuitions are biased :)

@sotolf Nah, you are not biased, just sensible! 😉

@FediThing

@ruari @FediThing

Well at least I'm sensible when it comes to one thing :p

@sotolf Indeed, it is just that one thing. 😜 @FediThing