Exploring why the world tells time in 12 and 24 hours. Why is a day divided into two 12 hour parts, and what issues arise when we try to convey and communicate time.
I couldn't find accurate data for them online. If you know details for any specific missed countries, please feel free to share! This data is still a little wild west from what I've been seeing in the comments and that's even after cross-referencing quite a few different sources.
After frequent email conversations with colleagues in Japan and other parts of the world, I bought a digital watch and forced myself to learn the 24h time system. I actually like it a lot better than the am/pm time system.
I started using the 24-hour time after I showed up to work a whole 12 hours early because I forgot to write am. I love the 24-hour format so much. I just wish others in my life would embrace it too.
Somehow, as a German, I don't really like the fact that Germany is labeled as a "both 12 and 24 hour country". We do use the 24-hour clock in normal conversations just as much as the 12-hour clock, however the latter is not that prominent. We only really use the 12-hour system when talking about something that takes place on the same day, and in the same half of the day (If someone asked me "When does the party start" in the morning, I would say 21:00 o'clock. However, if they asked me in the afternoon, I would tell them 9:00 o'clock since the morning has already passed, so there's no chance of a misunderstanding.
For a lot of the countries that are marked 12/24, this kind of casual conversation structure seems pretty common. 24 hour time is typically the way it is formally conveyed, with 12 hour time being slang or conversational communication.
@@PP-iq7co I don’t disagree with you, but the 24 hour clock is so much easier to figure out time zones and see add/subtract hours. Try it out like it’s actually a life changer. I use 24 hour clock on my phone, but when someone asks me for the time, I say the 12 hour clock term.
@@PP-iq7co easier to distinguish, very useful for written forms and calculating time. AM PM uses letters, which may be obnoxious if you have to program something.
Here in the Philippines, both 12-hour-based and 24-hour-based are being taught in schools. I mylsef just learned the 24-hour-based time when I was in Grade 7. The 12-hour-based is used by the media and by most people. But I also know many people here that uses 24-hour-based on their scheduling, especially on their cellphones. There is weird thing I just saw, that there are some Filipinos that find 24-hour-based as grand, no idea why, haha.
México uses both, 24 hour for formal pourposes and 12 hour for conversation, here everything like TV ads, public digital clocks, dates and reports in everything are in 24 hour system, but every single normal person uses 12 hour system for conversation.
WOW! Most videos that teachers set for kids to watch are like little kid ones or random videos. But, this video was interesting and not at all boring! I am giving this video a bid fat LIKE!!
Before I retired I worked for an international airline for 35 years so naturally I use the 24H clock, I don't see what the big deal is. Here in the UK I think we use both..
Well we do use both, all offical time tables and what not, are usually always 24 hour but if you want to visit someone at 5 for tea.... its probably going to be 1700hrs unless you are mental.
I do believe many of the countries officially using the 24h-system would just say the regular numbers in day to day conversation. Say me and some collegues will meet after work for a couple of beers, I would be like "meet you guys at eight, tonight"
I have known people in the "British" countries with the 12hr clock miss air flights because the ticket is in printed in the 24hr clock, so when it say's Tuesday 00.25 they should be at the airport on Monday evening not Tuesday.........
Owen Wood-bevington Great Britain 🇬🇧 has given birth to 4 nations ( 🇺🇸 🇨🇦🇦🇺🇳🇿) and they all have British DNA infused into their culture, so I’m assuming they use a 12 hour clock because Great Britain does.
24:00:00 does not exist. If it did it would be in the day before 12:00:00 AM (24:00 is hence used in spoken language to mean midnight at the end of the day, but it is only achieved by rounding up 23:59:59 point more 9s than you care to mention). 00:00:00 = 12:00:00 AM, this need for 3 different times a day the clock is 12 in spoken* AM/PM language is one of the reasons to avoid the 12 hour system. Very poor start to be off by a full day for a video meant to explain 24h time. *First: 12 Midnight in the beginning of the day (12:00 AM), second: 12 noon (12:00 PM) and third: 12 midnight at the end of the day (can not be written, unlike 24:00 that does not exist, but can be written and talked about using the standard time format). 24h clock spoken have 0, 12 and 24 with no ambiguity.
As an (relatively) rare american non former military 24 hour time user I love its simplicity. Not only that but its simply more efficient when setting alarms on a phone. Add in the fact that if I see a 1 I know I should already be in bed but if I see a 13 I know I just had lunch. All dad jokes aside its simply more efficient.
"Why are days even split by 12 to begin with?" Answer: tides. If an hour is defined originally as the time taken after low water for 1/12 of the tidal range to be reached, then during the next hour another 2/12 will be reached, and the hour after that another 3/12. At the end of the 4th hour yet another 3/12 is added but by the end of the 5th only another 2/12, and at the end of the 6th just 1/12 again by which time high tide is reached. The sequence 123321 represents the rise and fall of tidal flow speed, and the sum of these six numbers is 12. The number of hours from high tide to next high tide is 12. Two tides a day means 24 hours. These figures were independent of daylight and night-time and therefore of season and sun dials, after all mariners are prepared to set sail or enter port any time of the day or night, summer or winter. And many of them still use this "rule of twelths" for deciding when exactly to do so.
Cool comment. Tides are also an effect of the rotation of the earth, so it makes sense that there would be a relation to the day/night cycle. Hadn't seen the 12 hour correlation/breakdown before though.
Thanks. I suppose I'm trying to argue that although the day/night and tidal cycles are both an effect of the earth's rotation, they don't coincide, and that the first 12 hour clocks were designed to log the latter. And although the tidal range, and hence the length of an hour, varies over the month (spring and neap tides) and from one port to another, it doesn't "vary wildly over the year". Yes, 12 breaks down nicely into 1+2+3+3+2+1 in a way and with a result that other nearby numbers, 10 and 16 say, don't. For that reason it might have come to be applied to other natural cycles.
Actually, it's just occurred to me that the length of an hour might not in fact vary with the tidal range at a given place or time of the month. A bigger range doesn't mean a longer time to cover it, or a proportion of it, just that the water flows in and out faster. What do you think?
My Class insisted that I say, at 3:13 the Saturday time should go from 00:00 to 23:59. Your clock will never say 24:00 and they're so triggered, Love 5/6 VIP
From a communication and clarity standpoint, ask them how they would convey “Saturday at midnight”? I understand that technically 24:00 Sat = 00:00 Sun and what you’d typically use, but saying Sat 21:00-24:00 or Sat 9:00-midnight is a lot clearer than Sat 21:00-23:59:59 or Sat 21:00-Sun 00:00. Search Wikipedia for “24-hour clock” and you should see some great examples of the practical uses of “24:00”.
We ultimately use 24h, but saying 7 o clock of evening for 19:00 is ok. Most interesting thing is midnight, it usually called as 12 o clock of the night, and other hours till 6 are also "night" hours, then go morning and day hours. If 12h had 4 marks it will be a lot less confusing.
The only problem I have is when they say it's 7 o clock they don't specify if it's am or pm, and you have to guess (12 hour time). If the person says it's either 7 o clock or 19 o clock, then I know it's night or morning (24 hour time). Now imagine calculating a battery that last 60 hours, and you want to know the amount of days it will last. If you take 60/12 you get 5 which makes no sense but it you divide it by 2 you get 2,5 days (12 hour time). If you use 60/24 you get 2,5 days (24 hours). You do need to divide the time when using 12 hour time twice, but you only have to divide once with 24 hour time.
In Russia we count only in 24 format. But when it comes to talking we often speak in 12 hour format. I can understand speaking in 12 hour format, but counting? Hell no
Thanks for the update. I tried to cross reference a bunch of different sources but it looks like a lot of resources are off online. Always great to hear from individuals familiar with specific countries.
It seems like you made a mistake. 1:00 a.m. is not "1 hour before midday"; it is "1 hour after midnight" or "11 hours before midday". Similarly for 12:59 a.m. Also, 1:27 "caesium" is pronounced "seize-ium", not "cess-ium".
I was showing the confusion of the logic in the naming. Not sure if that is the best way to convey the 12:59am to 1:00am ridiculousness concept, but I tried ;) And you’re right, I did pronounce Cs wrong -_-
no 1 should b confused by da sat. midnight...bcuz its still sat at 12:00pm midnight it does not turn sun until 1201am..even wen we talk 2 each other.. ie..we could go out, get 2 club 12:30am "sat.nite" go 2 church 10.00am(sun.mrng)...talk 2 friend after church and say i went out "last nite"(sat.nite 12:30am) not i went out dis morning..
It goes from 11:59pm Saturday to 12:00am Sunday. What you stated is incorrect and just further proves how much more efficient the 24 hour format is over the am/pm format.
You know what, you're right! In fact, I mistakenly made the graphic have Georgia, Armenia, and Azerbaijan labeled as 12 hour countries versus 24 hour. Good catch!
Glad to see you're hungry for more! I've been just slammed with work and fourth kid's birth, but I do plan on getting back to it soon. Have a ton of fun topics I'd like to hit!
oh n dont confuse yaself puffin...u said it n ur vid brits did it all bout ctrl..y u think we gotta move time ahead or back a hr plus dey have 2 change da dayz dey do it on..24hr time(!da original!) deres no need..
