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A collection of some classic Lemmy memes for your enjoyment
If the day started at 1:00 then by the second hour you would be at 2:00, even though only 1 hour has passed. Effectively the day starts at 0. In fact in 24-hour time that is how it's depicted, 00:00 with midday being depicted as 12:00, so it isn't confusing
Careful, there are Americans around
Americans love units based on 12
In the roman empire the day/night cycle was divided into 24 segments. 12 for the day and 12 for the night which also meant a day hour in summer was longer than the night hour.
"At least we're not mixing in letters"
I see IIII in there and I cry a little on the inside.
This has become a standard on analog clocks and watches (presumably to avoid confusion with VI), but for some reason IX and XI (for 9 and 11 respectively) is fine.
Personally I’d like to see IX and IIIIIIIIIII.
ETA: I guess IX and XI are ‘fine’ because they’re not upside down, but my point still stands.
IIRC they counted the bones in their fingers using their thumb and that gives 12. The first sundial was around the equator and there is always light for half a day, so half a day becomes 12 hours.
To count large numbers often one hand was used to count using 5 fingers and the other to count the bones, so you get 5x12 for 60 minutes.
AIUI there was an aspect in the divisibility of the numbers being convenient.
12 is divisible by 2, 3, 4, and 6. 60 is divisible by 2, 3, 4, 5, 6, 10, 12, 15, 20, and 30.
10 is divisible by 2 and 5. 100 is divisible by 2, 4, 5, 10, 20, 25, and 50.
If you want to minimize dealing with fractions, 12 and 60 are far more convenient than 10 and 100.
At least our hours are the same length regardless of latitude now, so let's be grateful for that.
The french:
Why the 'IIII' insted of 'IV'?
Prevents confusion between the four and the six: III, IV, V, VI, when the watch is not held perfectly vertically for viewing.
It's the same logic that was used by ancient astronomers to arrive at 360 degrees for a full revolution.
The math is easier if you have to do it by hand.
These are called "superior highly composite numbers" apparently https://en.wikipedia.org/wiki/Superior_highly_composite_number
It's also the one advantage Imperial has over metric. It's easier to do mental math in a lot of cases in base 12 rather than base 10.
Now excuse me while I bar my windows and doors from the mobs of angry people that show every time I point this out.
I only recently learned the etymology of the word: "second"
Its name comes from being the "second" division of the hour, with the minute being the first.
Somebody never had a clock with roman numerals and it shows
I remember getting into an argument with a grade school teacher over IIII because most such clocks put that for 4 instead of IV because of some fuckin reason
I despise these so so much. IIII was historically NEVER correct. Some doofus decided to put that on a clock because it looks more symmetrical with the VIII on the other side. Terrible reasoning.
"However, even though it is now widely accepted that 4 must be written IV, the original and most ancient pattern for Roman numerals wasn’t the same as what we know today. Earliest models did, in fact, use VIIII for 9 (instead of IX) and IIII for 4 (instead of IV). However, these two numerals proved problematic, they were easily confused with III and VIII. Instead of the original additive notation, the Roman numeral system changed to the more familiar subtractive notation. However, this was well after the fall of the Roman Empire."
https://monochrome-watches.com/why-do-clocks-and-watches-use-roman-numeral-iiii-instead-of-iv/
At least we're not mixing in letters
Zulu Time: Am I a joke to you?
Don't listen to OP's bullshit.
They work for big clock. They're trying to convince you 12 hour clock is useless so they can sell you double the clock.
The 6 means 30, both of which also mean 1/2
Days start at 0h, not 12h
It can't start at 12 hours if there are 24 segments.
And keep your letters out of it too.
Sundials.
Now if you want to get really pissed, the magnetic North Pole is actually the South Pole of the Earth’s magnetic field. We call it the North Pole because the north side of a magnet points to it.
