4 ms·

I can never remember if AM is After Midnight or After Midday or PM is Post Meridian or Post Midnight, or it's something like that, not to mention when 12:00 is.

I can never remember if AM is After Midnight or After Midday or PM is Post Meridian or Post Midnight, or it's something like that, not to mention when 12:00 is... is it 12:00 or 0:00?. But ah well, I'm lucky to be in a place where we use 24h clocks (but hey, max we see is 23:59:59!) (unless they have arms). Btw, the iOS calendar is (was probably) also pretty "broken" [0] [0]: https://www.youtube.com/watch?v=ER1a6jgW1Gs https://www.youtube.com/watch?v=ER1a6jgW1Gs

madaxe_again 1y ago
AM is ante meridian - PM post meridian. Meridian is midday.
- 01HNNWZ0MV43FF 1y ago
  But midnight is exactly 12 hours post and ante meridian. And meridian is neither 12 hours post nor ante of itself. Where I can, I just say "noon" and "midnight". 12-hour time is frustrating because of this 0 == 12 bullshit
  - bubblebobble99 1y ago
    That’s the point though. They are called noon/midday and midnight. There is no am/pm on the 12. It’s 11:59pm, midnight, 12:01am, and 11:59am, midday, 12:01pm. Really it’s not that confusing, it’s just two points in time in the whole day and it’s fairly easily to tell which of them you are at unless you are close to the poles.we’ve managed to cope this long with them.
    - dimava 1y ago
      Except 12:01 is in 24-hour clock which doesn't have 12:00 problem in the first place
    - zoover2020 1y ago
      That's a lot of mental gymnastics to say 24h clock is easier
    - godelski 1y ago
      > There is no am/pm on the 12. This is 100% false. What are you even talking about? It's so obviously false too > it’s fairly easily to tell which of them you are at unless you are close to the poles How does looking out the window help set an alarm? > we’ve managed to cope this long with them. Look, I'm American too and I get AM/PM but lots of the world uses 24hr clocks. Maybe if you stop talking about how smart you are you'll actually be able to hear the question you're trying to answer. It'll go a long way to making other people think you're smart.
    - exidy 1y ago
      This isn't right. Midday / midnight are not the 60 seconds it takes for a digital clock to go from showing 12:00 to 12:01. They are the infinitesimally small point in time that mark the transition between "before" and "after". Like throwing a ball up into air, there is no time where it is not either rising or falling, but there is a point where it transitions from one to the other. So midday is 12:00pm. As soon as the moment has been observed it has passed, and you are now "post meridiem".
  - exidy 1y ago
    This is the problem with the digital world. Time is analogue and continuous, digital clocks are just a quantised approximation. Midday and midnight are points in time that have no duration -- as soon as they are observed they are passed, so midnight is 12am and midday is 12pm. This is easier to visualise on an analogue clock with a continuous seconds hand. Although the hand sweeps past 12 it spends no time there. Alternatively think of a digital clock with very high precision. While your ordinary clock will show 12:00pm at midday for a full minute, your high precision clock might be showing 12:00:00.0000001 -- indisputably "post meridiem".
- godelski 1y ago
  Another way to remember is that A is before P alphabetically. Probably easier to remember if you don't need the other concepts
hopelite 1y ago
You almost had me all confused with that much confused and wrong information. It’s really not difficult, or are you doing that juvenile bit where derision masks the incompetence you admitted to? Just remember A comes before P. But on a related note, do you tell people you will meet at 16 or 22 o’clock? I guess if you speak some other language that strongly types time with “…Uhr”, “…Uur”, “kl.…” it makes sense that you might not notice a difference. We can just say 4 or 10 and no one is confused, based on context, that it does not mean in the middle of the night or next morning, unless of course it’s a morning related context. It’s simply far more human oriented, just like the US Customary Measurement system is a human scale system because it was devised by humans for practical reasons and purposes, to work quickly and efficiently, not necessarily to a nanometer precision. The different systems can exist at the same time, your zealous mindset notwithstanding.
- Yizahi 1y ago
  Sequence starting at 12, 01, 02, 03 etc. is "human oriented"?
  - hopelite 1y ago
    What do leading zeros have to do with whether people use 12 hour time instead of 24 hour time? Why is this stuff challenging, it feels like reddit over here. My point is that saying "we will meet at 4" is more human scale than "we will meet at 16" because it segments the context window into morning and afternoon for which most humans and situations do not require additional external context to put meaning to.
    - Yizahi 1y ago
      Leading zeroes have obviously nothing to do with my question. Reordered integers did though. You'd be surprised but people in Europe also don't say "sixteen o'clock", they say "four" or "seven in the evening" if it is ambiguous. But at the same time the physical clocks and texts between people have completely clear and unambiguous time, one can understand it instantly. Why with British/USA time, when the clock is between 12 and 1, I always need to stop and analyze which of the bullshit time segments it is referencing, because of the wrong order of numbers, starting at 12, then going back to 1, then forward to 2 etc.
ThePowerOfFuet 1y ago
PM is noon and beyond. AM resumes at midnight.

madaxe_again 1y ago

AM is ante meridian - PM post meridian. Meridian is midday.

01HNNWZ0MV43FF 1y ago
But midnight is exactly 12 hours post and ante meridian. And meridian is neither 12 hours post nor ante of itself. Where I can, I just say "noon" and "midnight". 12-hour time is frustrating because of this 0 == 12 bullshit
- bubblebobble99 1y ago
  That’s the point though. They are called noon/midday and midnight. There is no am/pm on the 12. It’s 11:59pm, midnight, 12:01am, and 11:59am, midday, 12:01pm. Really it’s not that confusing, it’s just two points in time in the whole day and it’s fairly easily to tell which of them you are at unless you are close to the poles.we’ve managed to cope this long with them.
  - dimava 1y ago
    Except 12:01 is in 24-hour clock which doesn't have 12:00 problem in the first place
  - zoover2020 1y ago
    That's a lot of mental gymnastics to say 24h clock is easier
  - godelski 1y ago
    > There is no am/pm on the 12. This is 100% false. What are you even talking about? It's so obviously false too > it’s fairly easily to tell which of them you are at unless you are close to the poles How does looking out the window help set an alarm? > we’ve managed to cope this long with them. Look, I'm American too and I get AM/PM but lots of the world uses 24hr clocks. Maybe if you stop talking about how smart you are you'll actually be able to hear the question you're trying to answer. It'll go a long way to making other people think you're smart.
  - exidy 1y ago
    This isn't right. Midday / midnight are not the 60 seconds it takes for a digital clock to go from showing 12:00 to 12:01. They are the infinitesimally small point in time that mark the transition between "before" and "after". Like throwing a ball up into air, there is no time where it is not either rising or falling, but there is a point where it transitions from one to the other. So midday is 12:00pm. As soon as the moment has been observed it has passed, and you are now "post meridiem".
- exidy 1y ago
  This is the problem with the digital world. Time is analogue and continuous, digital clocks are just a quantised approximation. Midday and midnight are points in time that have no duration -- as soon as they are observed they are passed, so midnight is 12am and midday is 12pm. This is easier to visualise on an analogue clock with a continuous seconds hand. Although the hand sweeps past 12 it spends no time there. Alternatively think of a digital clock with very high precision. While your ordinary clock will show 12:00pm at midday for a full minute, your high precision clock might be showing 12:00:00.0000001 -- indisputably "post meridiem".
godelski 1y ago
Another way to remember is that A is before P alphabetically. Probably easier to remember if you don't need the other concepts

hopelite 1y ago

You almost had me all confused with that much confused and wrong information. It’s really not difficult, or are you doing that juvenile bit where derision masks the incompetence you admitted to? Just remember A comes before P. But on a related note, do you tell people you will meet at 16 or 22 o’clock? I guess if you speak some other language that strongly types time with “…Uhr”, “…Uur”, “kl.…” it makes sense that you might not notice a difference. We can just say 4 or 10 and no one is confused, based on context, that it does not mean in the middle of the night or next morning, unless of course it’s a morning related context. It’s simply far more human oriented, just like the US Customary Measurement system is a human scale system because it was devised by humans for practical reasons and purposes, to work quickly and efficiently, not necessarily to a nanometer precision. The different systems can exist at the same time, your zealous mindset notwithstanding.

Yizahi 1y ago
Sequence starting at 12, 01, 02, 03 etc. is "human oriented"?
- hopelite 1y ago
  What do leading zeros have to do with whether people use 12 hour time instead of 24 hour time? Why is this stuff challenging, it feels like reddit over here. My point is that saying "we will meet at 4" is more human scale than "we will meet at 16" because it segments the context window into morning and afternoon for which most humans and situations do not require additional external context to put meaning to.
  - Yizahi 1y ago
    Leading zeroes have obviously nothing to do with my question. Reordered integers did though. You'd be surprised but people in Europe also don't say "sixteen o'clock", they say "four" or "seven in the evening" if it is ambiguous. But at the same time the physical clocks and texts between people have completely clear and unambiguous time, one can understand it instantly. Why with British/USA time, when the clock is between 12 and 1, I always need to stop and analyze which of the bullshit time segments it is referencing, because of the wrong order of numbers, starting at 12, then going back to 1, then forward to 2 etc.

ThePowerOfFuet 1y ago

PM is noon and beyond. AM resumes at midnight.