The units of time we use come from a bronze age civilisation that used base twelve instead of base ten. They’d count on their hands using the finger joints of one for single digits, and then the joints of the other for multiples.
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rm_dash_r_star@lemm.ee 1 year agoAlso why the seemingly arbitrary graduations, 24 hours, 60 minutes, 60 seconds. If it was say 10 hours in a day, 100 minutes in an hour, 100 seconds in a minute, seconds would be close to the same amount of time. Same with latitude and longitude, why 360 degrees in a circle with 60 minutes in a degree and 60 seconds in a minute.
Harrison@ttrpg.network 1 year ago
themeatbridge@lemmy.world 1 year ago
The short explanation is that those numbers are more easily divided by a larger set of denominators. 24 is divisible by 2, 3, 4, 6, 8, and 12. 100 is divisble by 2, 5, 10, 25, and 50. 60 is divisible by 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, and 30.
Metric is great for scaling up and down ad infinitum, but it sucks for fractions. Fractions are easier for daily use without precision measuring equipment.
AlexisFR@jlai.lu 1 year ago
That’s called Decimal time and revolutionary France already tried it.
FunkFactory@lemmy.world 1 year ago
Other commenters hit on the reasoning, just adding that they’re called highly composite numbers. My favorite!
superkret@feddit.de 1 year ago
It’s all based on 12, which is nice cause it’s divisible by 2, 3, 4 and 6.
A system based on 10 gives you issues if you want to divide the year into 4 seasons, the day into morning, midday, evening and night, the compass into cardinal directions, etc…