As someone who grew up with a 24-hour clock, I can deal with 12 hours. Usually there’s no confusion if your store opens at 7am or 7pm. But 12:30PM being a valid time and meaning ‘00:30 on the next day’ fucks me up every time.
this post was submitted on 12 Apr 2026
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12:30 AM is 00:30 though?
They shouldn’t even have 12 on the clock, it should be 0 because the 12 hour clock is module 12.
Case and point as to why it's confusing lmao
"case in point" although "case and point " is arguably an eggcorn
Damn, just learned I've been using that phrase wrong my whole life
12:30PM means 30 minutes after 12-noon.
Anoyone saying that and meaning the middle of the night is just wrong, and if that's a genuine thing people do it would drive me quite mad.
30 minutes after midnight is 12:30AM
Perfectly illustrates how it doesn't make sense.
I can get behind
- 11.30pm
- 12.30pm
- 1.30am
Or
- 11.30pm
- 0.30am
- 1.30am
But
- 11.30pm
- 12.30am
- 1.30am
just doesn't make sense.
You start counting the hours to the next noon at midnight, duh. That's why it's ante-meridian, and the beginning of a new day.
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As I said, it always fucks me up. The AM/PM indicator wraps at a different hour than the hours. Aaargh!
Literally this. I was never in the military, and I'm glad they literally can't draft me unless they lower a lot of requirements really fast. But 24-hour time is just so much more sensible. There's no "AM or PM?" follow-up question, no guesswork. It just makes sense.
If they made metric time, I'd adopt that shit in a heartbeat.
the standard time that almost everyone uses is metric, i.e. is part of the metric system, its units are SI units. there was a system of decimal time, if that's what you mean, developed in France during the revolution, where a day is 10 hours, each 100 minutes, each 100 seconds
so a decimal hour is 2.4 standard hours
a decimal minute is 1.44 standard minutes
a decimal second is 0.864 standard seconds
I think it's cheating to call it metric if it's not decimal. Even some of the oldest analog clocks had 24-hour faces, they were just a bitch to read in a watch-size. You still have to do stupid math to figure out duration past the 12 or 24, and even with the 60 minutes/1 hour. Nothing metric or superior about it.
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This teaches you the value of terms like “half past noon“ and “quarter to midnight“
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"Closes at 25:00" is funny too
But luckily unambiguous.
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are Americans really confused with 15:30?
Only inasmuch as I have to count from 12 because I don’t have the built-in instinct for that time format.
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Nah, all you need is a little time to get used to it. It's my default setting on most of my devices. Once you get used to it, it's much easier to tell am vs pm at a glance, which is helpful when looking at timestamps (I work in IT, timestamps are important.)
I’m regularly looking at log timestamps and I still need a very brief half second to think about the time lol
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Written as 1530, mostly only Americans who have been in the military and their friends will know what you mean.
15:30 they'll know it's a time.
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I think they see it as some kind of metric time, and therefore something to be avoided at all costs.
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I do it because then I don't put my calendar appointments in at oh, 3:00 AM.
15:00 is SOOOOOO much better for adhd me.
Also: it makes total sense! 24 hours, 24 separate numbers. It's the most logical conclusion.
Also fewer wasted pixels on the am/pm text. 24h is just objectively superior in every way.
Large parts of the world use 24h time regularly. Only Americans, as far as I know, really struggle with 24h time, roundabouts, and bidets as concepts.
American here. I use 24h time, vastly favor roundabouts over traffic lights, and I would rather poop at home with my bidet attachment than get paid to poop at work. I'm not exactly your average American, but there are probably millions of us. The world mostly hears the loud dipshits because they are loud and their thoughts are dipshit enough that people who hear them feel the need to tell somebody about what a stupid dipshit take they heard from some loud dipshit.
12 hour time is a scam created by clockmakers who wanted to save paint.
Dealing with dates and times in software will get you formatting using year-month-date and 24 hour time as the least possible chance for confusion.
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Bahh.. The full day is 2π.
- 12:00 is π
- 15:00 is 3/2π And so on... Sane people use 2π = 𝜏 instead.
24hr analog watches are the real shit, though!
Had a good emulated one on my phone homescreen for a long time, but unfortunately app is not supported by newer versions of Android any more... :-(
Are you talking about a watch with 24 different numbers on it?
Are you talking about a watch with 24 different numbers on it?
Yes, arranged in a circle, 24 at the top, 12 at the bottom, lower part is day, upper part is night.
App also had a daylight indication shading depending on local sunrise/sunset.
Loved it!
Wow, never knew that was a thing
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There are two comments here:
- I can count to 24
- I get confused by 12PM
The real crime is dividing the day into 24h, 60m per hour, 60s per min.
A LOT of western measurement was base 12, the only reason people are so used to base 10 is because that's how many fingers most people have. Base 12 is really useful however, it is uniquely divisible and 60 as 5*12 is even more so.
I don't know why western, cause we got that from the Babylonians
Maybe it's because of my understanding of history but I'd consider Iraq to be Western. It was more or less linked in with Europe going back to the bronze age much like how North Africa was. Frankly speaking the only reason it is usually separated is because of the great Schism and then the crusades which caused much of Europe to consider it as other.
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Only muricans think 24h clock = military time 😂
My sleep schedule is shit. I set everything to 24 hours so that I don't wake up at 8 PM and think that I'm late for my work at 8 AM.
I used to work in radio, and we kept our logs in 24h time.
And nurses I guess.
It’s cause crayons that come in 24 packs taste better than the 12 packs
if I eat crayons and let another guy fuck my wife am I larping? would it be stolen valor
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