TL;DR: mostly ancient math and moon stuff.

This article suggests 60/60 came from the Sumerians who used a base-12 counting system. This and other articles note that 60 is more flexible than 100 in many ways as it’s divisible by 2, 3, 4, 5, and 6.

The Babylonians invented the 360 degree circle, and so understood the sun to move about 1 degree per day.

The number of days in a week and weeks in a month is based on lunar phases (month=moon, and in Chinese the word for month is the same as moon, 月). This article says the approximately 28 day month is traced to ancient Mesopotamia with leap days used to stay consistent in the long run. As for days of the week that article also says they were based on the 7 non-fixed heavenly bodies visible to the naked eye.

Well, the time for eath rotation isnt a constant, it will slowly decelerate and days will be longer.

Using multiples of 10 for time was considered, but was a shitty option compared to the current deal. Months should all be 30 days and then have a free week at the end of the year tho, egyptian style.

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Writing this in 634.023.M3 Imperial Calendar i agree we should change it to juche

Time measurements like heat, mass, length etc are arbitrary units. It is just that they are the oldest.

The Sumerians gave us our time standards and they loved base 12. So twelve hours in the day and 60 (5x12) minutes in the hour. Also 12 months in a year and 360 degrees in a circle.

The French actually tried to implement decimal time after the revolution but reverted back after 6 years or so.

Americans use the imperial system, yet claim not to be imperialist. Curious 🤔

Here is my insane take:

We should use some large multiple of ten of plank units for distance measurements,

Then we can use a noticable on our scale time period in plank time units to measure time.

That way when we can set easier standards for when we meet our extra terrestrial comrades.

Unfortunately, seasons, years, when it’s light out compared to the length of a day… These are not conveniently metricised.

Because there’s 365 days in a year (duh). I mean, if it were, like, 200, then a year would be 0.7 season cycles?

Same for a day. If we set it to, say, 10000 minutes or whatever, noon could very well end up as the middle of the night eventually.

As for the minute and hour, how else would you fit seconds into a day? 24*60 square rooted for equal units? So we have 120 new minutes each 120 seconds long? I mean, I could see that sort of working? But it’s still pretty weird, and not a true decimal. So I guess you’d have to rework seconds also.

Edit: months are based off the moon, and there would be no way to somehow make units of 10 months fit into a year, which literally cannot be anything other than 365 days, unless you want your afternoon tea parties 0.12 daylengths past midnight.

Since we are on the topic of time measurements, take Caesar and Augustus’s names off of my calendar please and thank you.

Also, if you can fill in February to be full 30 days, that’d be great as well. Take a day off from each of the emperors.

The only metric unit of time is the second. all the other ones are customary units that are geared towards living on Planet Earth. There was a movement for decimal time at one point, but it never really took off. Given that the length of a day changes, I don’t see how it would remain stable either. Which is something that SI units try very hard to make sure doesn’t happen.

The main reason is because we use natural cycles that are important for civic and agricultural reasons as the basis of our measurements. And those cycles are unrelated phenomena that don’t match with each other well.

Day and year are based (duh) on two solar cycles (Earth’s rotation and translation), while the month and week are based on the lunar cycle of translation around the earth in roughly 28 days. When people tried to force lunar and solar calendars to fit, we ended up with the inconsistent months we have.

The 12/60 base divisions of the day were chosen before we had good calculators. Numbers with many divisors like 12 and 60 help a lot with mental math when you don’t have calculators.

There have been proposals of better calendars. The French tried something during the revolution and other people as well. The French republican calendar was:

• 1 hour = 100 minutes
• 1 day = 10 hours
• 1 week = 10 days
• 1 month = 3 weeks
• 1 year = 12 months + 5 monthless holiday

Another idea is the Cotsworth Plan:

• 1 minute = 100 seconds
• 1 hour = 100 minutes
• 1 day = 10 hours
• 1 week = 7 days
• 1 month = 4 weeks
• 1 year = 13 months + 1 special monthless holiday

I like the French Republican Calendar, but I would change it to months with 6 weeks of 5 days instead. And divide the week into 3 work days, 2 weekends.

12 hours in half a day is fine for me. 12 can be divided into halves, thirds, quarters and sixths. That’s useful for planning out a day. Time is one of the applications where I don’t have a complaint about using base 12.

Hot take: imperial units are fine for normie stuff (as in, not engineering or math or whatever)

They come in useful sizes! Feet are handier than meters and gallons are better than liters. And unit conversion between feet and miles, pounds and tons, etc. isn’t something that ever happens in day-to-day life. It sounds silly to say that a mile is 5280 feet but I’m pretty sure that ratio was decided retroactively for the sake of making the system consistent. As in, no one knows or cares about converting between the two because we already know how long a foot is and how long a mile is. Also no one uses the obscure units like gills and barleycorns.

Base ten is trash and a glorious socialist utopia wouldn’t use ivory tower measurements that aren’t actually useful for performing labor.

A base 12 or 60 system is much more flexible for “small” human scale measurements, with base 10 being a bit more useful for “far distances,” for orders of magnitude estimation because of our base10 numbering system, but then going back to a large divisor system for galactic distances. For example a parsec is 648000/pi astronomical units, which isn’t metric in anyway shape or form, but is extremely useful for astronomical calculations.

We have a similar system to that today in America. Skilled Tradesmen will use imperial/base 12 systems for manual work. i.e. Construction, carpentry, etc. as the ability to use thirds and quarters of a unit without relying on fractions and having clearly defined lines on a measuring stick that have those thirds/quarters, is more useful then an arbitrary base 10 measurement that only has 2 divisors. The reason america still uses the “standard” system is that it is useful, not because of “boomers” or whatever.