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Unfortunately this won’t happen until October 31st 2600. Starting on March 1st in the year 2600, the Julian calendar (popular in centuries past, and still used in a few places) will differ by 18 days from the Gregorian calendar (the current worldwide standard calendar).

It happens that October 31st in the year 2600 lands on a Friday, and so the Julian October 13th, which lands on that same day, is also a Friday.

There may be a sooner Friday the 13th that lands on Halloween, if you know of other obscure calendars like the Hebrew, Islamic, or Chinese calendars. I don’t know enough about those to check.

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lugal@sopuli.xyz ⁨1⁩ ⁨week⁩ ago
I love it when people over analyze shitposts. Well done!

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pseudo@jlai.lu ⁨1⁩ ⁨week⁩ ago

obscure calendars like the Hebrew, Islamic, or Chinese calendars

That’s nit very nice to say, also very false

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- Limonene@lemmy.world ⁨1⁩ ⁨week⁩ ago
  I eagerly await your writeup on whichever calendar you think I need to know more about.
  
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  - pseudo@jlai.lu ⁨1⁩ ⁨week⁩ ago
    You don’t need to learn about other people calendar but you mentionned about 3 calendars that are very famous and used by a significant portion of the world population. That not something obscure at all. Just something that is not part of your culture and you don’t know.
    
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Ultraviolet@lemmy.world ⁨1⁩ ⁨week⁩ ago
It’s also always either 6 or 11 years (or 7 in very rare cases, when you’re on both sides of a skipped leap year like 1900 or 2100) between “day X falls on day of the week Y” events unless you’re talking about February 29.

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