this post was submitted on 15 May 2026
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Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The most popular seem to be lighthearted clever little truths, hidden in daily life.

Here are some examples to inspire your own showerthoughts:

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As an American who uses the 24-hour time, so many people use 12-hour I basically still use 12-hour.

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[–] nieminen@lemmy.world 3 points 14 hours ago

I'm American, but a software engineer, 24 hour clock for me! Totally understand I'm an outlier.

[–] Darohan@lemmy.zip 11 points 1 day ago (1 children)

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.

[–] Jo4ted@lemmy.zip 2 points 13 hours ago

Sounds sick! I'm in favor of standardizing this.

[–] Fmstrat@lemmy.world 5 points 1 day ago

Am American, use 24 hour time. It's only called military time here.

[–] brown567@sh.itjust.works 18 points 1 day ago (1 children)

I've used it since I was 12 🤷

[–] sqauffle@slrpnk.net 36 points 1 day ago (1 children)

You mean since you were 0?

[–] brown567@sh.itjust.works 18 points 1 day ago

Didn't get it at first, but scared my cat when I did XD

I be taking naps on accident like once a week. I need to know if I'm waking up at 8am or 8pm

[–] x00z@lemmy.world 21 points 1 day ago (1 children)

12-hour would only be somewhat decent if there wasn't noon/midnight confusion.

[–] Kolanaki@pawb.social 6 points 1 day ago* (last edited 1 day ago) (7 children)

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

[–] calcopiritus@lemmy.world 4 points 21 hours ago

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.

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[–] Treczoks@lemmy.world 36 points 1 day ago (1 children)

The US military also uses loads of metric things. "Real Americans" won't touch those, either. Apart from 9mm guns and ammo.

[–] ripcord@lemmy.world 9 points 1 day ago (1 children)
[–] TheRedSpade@lemmy.world 4 points 1 day ago (1 children)

Except we refer to that as "a fifth".

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[–] Switorik@sh.itjust.works 97 points 2 days ago (11 children)

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.

[–] Jo4ted@lemmy.zip 1 points 12 hours ago

It is, but a lot of people think it high-quality. I believe the saying goes "an engineer isn't someone who can make something work, it's someone that can make something barely work." Idk, I'm going into welding, not my expertise.

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[–] homesweethomeMrL@lemmy.world 56 points 2 days ago (3 children)

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?!”

[–] Jo4ted@lemmy.zip 2 points 13 hours ago

I just call it 24-hour. I, too, hate the "military time" name, but it's common here in the states.

[–] Stiggyman@ani.social 16 points 1 day ago* (last edited 1 day ago) (1 children)

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

[–] athatet@lemmy.zip 6 points 1 day ago

Can’t count past 12 but somehow fine with AM and PM even tho they are too confusing?

Also breaking up an hour into 15 minute increments does indeed happen.

[–] cobysev@lemmy.world 27 points 2 days ago* (last edited 2 days ago) (1 children)

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.

[–] redlemace@lemmy.world 1 points 22 hours ago

no confusion with our global allies.

So trump made it possible for military to go to am/pm /s

[–] Cevilia@lemmy.blahaj.zone 25 points 1 day ago (2 children)

I've never understood the 12 hour clock. Like, you just decide to reset the time at lunchtime or something? Why not have an 8 hour clock and reset the time after breakfast and just before teatime, it makes just as much sense

[–] Infrapink@thebrainbin.org 39 points 1 day ago

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.

[–] SpongyAneurysm@feddit.org 11 points 1 day ago (4 children)

You've never seen an analog clock?

That's where it comes from, and that's where it makes perfect sense. (An 8 hour reset wouldn't) No need to carry that over to digital clocks however.

[–] Infrapink@thebrainbin.org 16 points 1 day ago

You have it backwards. Analogue clocks are the way they are because of the 12-hour convention.

[–] Cevilia@lemmy.blahaj.zone 6 points 1 day ago* (last edited 1 day ago) (1 children)

Why wouldn't an 8-hour reset make sense? Just have 8 numbers instead of 12 and spin the hour hand a little faster.

A 12-hour analogue clock barely makes sense anyway. Mine's 24.

[–] SpongyAneurysm@feddit.org 6 points 1 day ago (2 children)

Well, time measurement and the division of the day into 12/24 hours is of course entirely a human concept and thus a bit arbitrary and made up, so yes, you could divise a system with 8 hour splits, sure.

But the 12-hour system makes sense as soon as you buy into the 1 hour = 60 minutes convention and split that up into 5-minute blocks. There are 12*5minutes in an hour, so after 12 hours your hour and minute hand reach the same position again, thus the reset.

That doesn't work so well with 8 hours, because you'd have to divide the hour into 60/8=7.5 minute blocks, which is pretty awkward.

Or you'd have to define the hour as having 64 minutes and divide it into 8*8 minutes blocks. And theres a dualist religion in my favorite fantasy RPG world, that would award you sainthood if you did that, but that's not the world we live in.

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[–] rumschlumpel@feddit.org 45 points 2 days ago* (last edited 2 days ago) (8 children)

24-hour-clock being a military thing is kind of a USA-thing anyway, in many other countries it's just normal.

I wish there was a more practical way to have an analog 24-hour-clock, a clockface with 24 numbers is kinda hard to read.

[–] NaibofTabr@infosec.pub 27 points 2 days ago* (last edited 2 days ago) (2 children)

There is, you have two sets of numbers for each hour marking like this:

or like this:

This requires no change to the time mechanism, so you can pretty easily modify the face of any standard analog clock to be like this.

[–] YiddishMcSquidish@lemmy.today 25 points 2 days ago (1 children)

That first one having "24" is making my eye twitch.

[–] ArmoredThirteen@lemmy.zip 7 points 1 day ago

Having a 0'o'clock is something that delights me to no end. I'm from the US but moved a bit ago and I get unreasonably excited to see my clocks showing all 0s

[–] rumschlumpel@feddit.org 13 points 2 days ago* (last edited 2 days ago) (2 children)

Not much of an improvement over the standard design. I already know that the clockhand pointing to 1 means that it's either 1 am or 13 o'clock/1 pm, but it still doesn't tell me unambiguously which one it is.

[–] JcbAzPx@lemmy.world 2 points 1 day ago (1 children)

Well, unless you're hanging out near one of the poles, it's pretty easy to figure out which one it is with minimal effort.

[–] rumschlumpel@feddit.org 1 points 1 day ago

It's vexing from a design standpoint, and TBH my sleep rhythm is bad enough that I do have an issue with it sometimes.

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[–] blackbeans@lemmy.zip 17 points 1 day ago (1 children)

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.

[–] Treczoks@lemmy.world 11 points 1 day ago

While trains were the big "clock unifiers" back then, here in Europe, the 24h clock is generally the local version of "time", without the "military" part.

[–] FriendOfDeSoto@startrek.website 18 points 2 days ago

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.

[–] robocall@lemmy.world 12 points 2 days ago (1 children)

American consumers will buy anything. Why hasn't anyone developed a military clock for proud American households?

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