• rmuk
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      1 year ago

      Did you know that the 13th day of the month is more likely to be a Friday than any of the other weekdays?

      • billwashere@lemmy.world
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        1 year ago

        I’m a nerd so I had to write code to check this out.

        https://pastebin.com/62kwesZz

        So from 1/1/1500 until 12/31/2023:

        Weekday counts: Monday: 898 Tuesday: 897 Wednesday: 901 Thursday: 896 Friday: 901 Saturday: 896 Sunday: 899

        No idea why, and other than a tie with Wednesday, this is indeed true. Well if my code is correct.

          • Makeitstop@lemmy.world
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            1 year ago

            For most proposals like this, new years day and leap day wouldn’t have a day of the week. And therefore the calendar wouldn’t change from year to year.

        • uis@lemmy.world
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          1 year ago

          until 12/31/2023:

          My eyes see mixed-endian! I want them to unsee it!

          Decide already whether you want 2023.12.31 or 31.12.2023.

        • rmuk
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          1 year ago

          I think your code is fine. The Gregorian Calendar actually runs on a 400-year cycle (i.e. the pattern caused by 7-day weeks, variable-length months and leap years repeats every 400 years) so if you re-ran the code against a 400-year period you’d get the correct ratios.