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[–] 58 points 3 years ago* (last edited 3 years ago) (3 children)

When I was a kid, I was such a nerd, that I invented my own decimal timekeeping system.

Even wrote a little macOS menubar clock for it — I was dead-serious.

Edit: omg the website still works, even though I never put any real content there …

http://yreality.net/UJD/

Edit 2: Found this old explanation I apparently put together in July 2010, according to my image archive:

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  • [–] 18 points 3 years ago (1 child)

    Okay but now you have to tell us how it works!

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  • [–] 20 points 3 years ago*

    All I can gather, is that the number furthest to the right seems to be 100ms, so the second digit from the right is counting seconds. When those 3 digits reach 000, they've counted 100 seconds.

    I see 19567288000 currently. If I remove the last zero, that number should be in seconds. So 1956728800 seconds = ~62 years. The year 2023 - 62yrs = 1961.

    Maybe it's counting the number of seconds since a date in 1961? Unix time uses 1970-01-01 but not sure what significance 1961 has.

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    [–] 55 points 3 years ago* (last edited 3 years ago) (6 children)

    Ehhhh, no. There are very important reasons we divide the time this way. 24 is a highly composite number (a number with more divisors than all numbers preceding it; like an opposite of a prime number). This allows us to easily divide the day into halves, thirds, quarters and sixths. So is 60, with even more divisors.

    My guess is the same thing goes for the switch from Roman to Julian calendar (ten to twelve months in a year).

    Interestingly, the same goes for 360 degrees in a full angle.

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  • [–] 30 points 3 years ago* (1 child)

    The history of the calendar in Roman times is actually an entire topic to itself.

    The pre-Julian calendar required fine tuning every year in winter to keep the rest of the months aligned with the seasons.

    Technically not a difficult job to keep the calendar running smoothly and consistently, but the person in charge of the calendar in Rome was a politician, so they would play political games with the length of the year.

    Caesar wanted a calendar that would run on auto-pilot to strip power away from those politicians.

    By sheer coincidence when Caesar made his reform, during the the changeover of calendars while he was in charge, he got to rule over a 400+ day long year.

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    [–] 54 points 3 years ago (1 child)

    We should just use second notation for everything.

    I’ll be there in 5 min? I’ll be there in 2 or 3 hundo!

    See you tommorow? See you in in 86K!

    Next week? About half a Megasec!

    Doesn’t Megasecond sound better than Fortnite?

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  • [–] 51 points 3 years ago (1 child)

    The reason for 12-hour clocks is most cultures worldwide have variable length hours of over a year. For Western times this comes from Greeks who had 12 day and 12 night hours. Early water clocks in antiquity would attempt to make that adjustment automatically.

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  • [–] 30 points 3 years ago* (10 children)

    The inventor of the imperial units used by the US, this one really sniffed glue.

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    [–] 29 points 3 years ago* (8 children)

    Why hasn't the Metric world found a better way? I want a clock based around multiples of 10, dammit!

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  • [–] 79 points 3 years ago (2 children)

    One benefit of base 12 and base 60 over base 10 for everyday use with things like time is simple factorization. You can divide 12 hours evenly into halves, thirds, quarters, and sixths, and 60 minutes evenly into halves, thirds, quarters, fifths, sixths, tenths, etc. With base 10, you've just got halves and fifths.

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  • [–] 26 points 3 years ago (4 children)

    Another benefit of base 12 is that you can count to 12 easily with one hand by using your thumb to count each of the 3 segments on your 4 fingers.

    I learned that on that other website prior to the great migration and it blew my mind then.

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  • [–] 7 points 3 years ago (1 child)

    tries it

    Whoa. Dude that's super useful.

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  • [–] 4 points 3 years ago (9 children)

    Yeah, I know all about that, but I don't think we'll convince people to change everything to base 12, so let's go with a base 10 clock.

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  • [–] 25 points 3 years ago

    A base-10 unit circle would be abhorrent. 1/2 of a circle is an important concept, but 1/5th and 1/10th of a circle are rarely used in geometry or trigonometry. Meanwhile, a right angle (1/4 of a circle) would require an ugly fraction, and the angle of an equilateral triangle (1/6th) would require a repeating decimal.

    Think of 12-hour clocks and 360-degree circles as paper bags. When we're fucking with angular concepts, you do not want to take those bags off Decimal's head.

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    [–] 24 points 3 years ago (1 child)
  • [–] 15 points 3 years ago (1 child)

    Chad American broken clocks: right twice per day Virgin Bri‘ish broken clocks: only right once per day

    pwnd

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  • [–] 12 points 3 years ago (3 children)

    Wait until you hear about traditional Japanese timekeeping, where the hours had different lengths throughout the year, depending on daylight: https://youtu.be/1BJmnEa6YGE

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    [–] 9 points 3 years ago (3 children)

    Also each part of the world will offset by half an hour or so.

    Also military will operate by a 24 hrs.

    Also fuck you

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    [–] 8 points 3 years ago

    "The day will start when the sun comes up?" No, when the sun is the furthest away it can be from us.

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  • [–] 8 points 3 years ago (1 child)

    Man I just want everyone to use UTC

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  • [–] 8 points 3 years ago

    The joys of a base-60 number system

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  • [–] 7 points 3 years ago

    12 1 2 3 4 5 6 7 8 9 10 11

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  • Oh and when the minute hand is 3/4s of the way to the 12 it's quarter too...5.

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