Military grade is defined as the lowest quality required to be used by the military, often resulting in the cheapest product that is still suitable for military use.
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The US military also uses loads of metric things. "Real Americans" won't touch those, either. Apart from 9mm guns and ammo.
750ml Bourbon
I call it “computer time” because I’m tired of people I’m talking with thinking its something to do with the military.
“UTC motherfucker! Do you speak it?!”
When I was a civilian, everyone called it military time, because only the US military used it.
When I joined the US military, they called it International Time, because the rest of the world used it and we were just meeting international standards so there's no confusion with our global allies.
Its just called time.
How many hours does it take the earth to spin? 24? Nah lets split it up into 2 12s because our people can't count higher.. And then lets make it have confusing AM PM tags depending on if its one or the other
Like fuck off you gonna have the 60 mins of the hour also be split into 4 so you dont have to count that high??
24h clock Is the norm
I just call it 24-hour. I, too, hate the "military time" name, but it's common here in the states.
I've used it since I was 12 🤷
Something that's been growing on me, but that I'm still unsure of, is 24-hour time that goes beyond 24 to reference the next day. I was in Japan recently, and there were many restaurants that would write their opening hours as, for example, 18:00 - 25:30, to represent that they are open until 01:30 the next day. Was confusing at first, but makes maths easier and means that intervals of time never count backwards! From memory, OpenStreetMap use this system, too.
Japanese people that understand 24h notation‽ In my experience with language exchange I've always had the issue that language exchange partners didn't understand 24h notation at all!
I also can't remember seeing this notation on opening times in my visits there, but maybe I haven't been paying close attention…
This comment is actually really interesting to me, because I was quite excited about all the 24hr time I saw over there, and remember 12hr being used pretty much only in text clearly intended for (english-speaking) foreigners. Not that I doubt your own experience at all, of course, but it did make me wonder where the difference comes from, and also if I'm just going crazy bc you seem to have more experience than I do. Couldn't find anything on regional differences from a cursory search, but FWIW, Wikipedia says that both are used pretty interchangeably, but does have a section on the specific phenomenon I'm talking about
Times past midnight can also be counted past the 24 hour mark, usually when the associated activity spans across midnight. For example, bars or clubs may advertise as being open until "30時" (i.e. 6 am) (See ja:30時間制)
Via https://en.wikipedia.org/wiki/Date_and_time_notation_in_Japan
American consumers will buy anything. Why hasn't anyone developed a military clock for proud American households?
Don't forget the klick. Most of them are not buying that either.
The people in all the countries that have no problem counting off another dozen past twelve don't always do that though. If you meet your friend at 15:00 most people will revert to "at 3" in their language. And they might "go to bed at 11." Economy of language and context clues. So colloquially the am/pm crowd and the 24h folks aren't far apart at all.
And any person claiming that it's too difficult to add or subtract twelve from at maximum a low two-digit integer ought to have their passport revoked.
I believe its roots have more to do with the railways than with the military. I have never called it military time to be honest.
12-hour would only be somewhat decent if there wasn't noon/midnight confusion.
If you see a working clock say 12:00 and it's sunny outside and you're not above a certain latitude: it's noon
What if someone tells you something is gonna happen at 12?
For example: you can turn in your assignments until 12 tomorrow.
That confusion could lead to you failing your assignment if they meant noon and you thought midnight.
Time is not only for the present, it's for the past and future too. You can't look at the sky in the past/future.
What if somebody says to meet at 12:30 AM? I would think that's an half hour past noon. Yet it often goes 11am -> 12pm -> 12:30pm -> 1pm. Absolute madness.
I agree with you up to the :30 part. 12:00am vs pm is nonsensical and seems like it could go either way.
But AM/PM means before noon/after noon, so 12:30 AM is unambiguously before the current day's noon, and 12:30 PM is definitely after the day's noon.
For determining 12:00AM VS PM I use the law of lease surprise. Basically it would be weirder for 12:01AM to be proceeded by 12:00PM since it would make sense for AM/PM to flip with the hour. Is this scientifically rigorous? Should we need this much philosophy to determine the current time: no, Hence the only real solution is to 24 hour time
Well since it goes like this 11:59am, noon 12:01pm and 11:59pm, midnight, 12:01am you have your am and pm figuring wrong.
Exactly. 12:01pm is stoopid.
I find the 12-hour practical for daily life. But I put my phone on 24 hour time when I’m traveling and find that to be helpful.
In ancient times, people did not have the concept of a "civil day"; they viewed day and night as separate things which alternated.
The Assyrians divided the day into six equal parts, and the night into six equal parts, called ush. But because sunrise and sunset move around over the course of the year, the lengths of day and night vary, and thus one ush during the day would not be the same length as an ush at night except around the equinoxes.
The Babylonians divided ushes in two to make hours, because it was easier to do astronomy in 12s than 6es. This resulted in 12 hours in a day and 12 hours at night, but daytime hours were still different lengths to nighttime hours, and the lengths of hours still varied over the course of the year.
The Greeks partially adopted the Babylonian system; they divided the day into 12 hours but the night was divided into four watches. The Romans copied the Greek system, but later went full Babylonian with 12 hours at night as well. (I feel like this coïncided with the rise of Christianity, but I have no evidence). The Romans introduced the concept of the civil day beginning at midnight (which the Chinese independently came up with), and over time, this led to the idea of 12 hours from midnight to noon, and 12 hours from noon to midnight. That idea postdates Rome, however; Roman hours were reckoned from sunrise to sunset and sunset to sunrise.
Assyrian astronomical knowledge seems to have reached China via India, as traditional Chinese timekeeping divides the civil day into 12 shi. Ancient shi were like Assyrian ushes; they were either 1/6 of a day or 1/6 of a night. Originally, midnight and noon fell in the middle of a shi, but this was changed to shi starting at midnight to make administration and astronomy easier. This system of variable-length shi continued to be used in Japan until about the Meiji Restoration.
Fixed-length hours are the result of analogue clocks, which are impractical to design to change the lengths of hours with the seasons (but not impossible; the wskusei clock is an ingenious Japanese clock from the 17th century that does exactly that). China had reliable, accurate water clocks by the Tang dynasty, while Europeans developed circular mechsnical clocks in the late Middle Ages. In neither case was it practical to make something as clever as the wakusei clock, so analogue clocks were marked the mean length of a shi or an hour as a reasonable approximation. Since there are 12 hours from midnight to noon and 12 from noon to midnight, that led to the 12-hour time system we know today.
I'm American, but a software engineer, 24 hour clock for me! Totally understand I'm an outlier.
I be taking naps on accident like once a week. I need to know if I'm waking up at 8am or 8pm
Only an American would think that the 24-hour clock has anything to do with the military in the first place.
why are 24 hours military grade?
Psst, confused American, let me give you a secret: Nobody uses the 24-hour clock in speech, we.just write with that and call 13:00 "1 PM" or something like that in our local language.
I wasn't confused before, but now I am. If you have to do the conversion to 12 hour to speak, what's the point?
I'm not american and I too prefer the 12 hour clock. 24 hour clock has never been intuitive for me. I always have to put in brain power to convert it in my head.

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