this post was submitted on 25 Feb 2026
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A photo of a cake with 8 candles in a row. The first and fifth candle from the right are lit. The caption reads "Happy 17th Birthday"

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[–] vrek@programming.dev 31 points 2 months ago (2 children)

Why do I confuse Halloween and Christmas? Because Oct 31 is the same as Dec 25

[–] oce@jlai.lu 7 points 2 months ago* (last edited 2 months ago) (1 children)

Octal 31 = 3 x 8^1^ + 1 x 8^0^ = 24 + 1 = Decimal 25

  • The Yuki language in California has an octal system because the speakers count using the spaces between their fingers rather than the fingers themselves.[2]
  • The Pamean languages in Mexico also have an octal system, because some of their speakers "count the knuckles of the closed fist for each hand (excluding the thumb), so that two hands equals eight."[3] https://en.wikipedia.org/wiki/Octal
[–] vrek@programming.dev 2 points 2 months ago (1 children)

Just curious since you seem knowledgeable, is there a connection between those societies? Or is it just chance they both choose 8?

[–] oce@jlai.lu 1 points 2 months ago

I am not knowledgeable about this, I just checked the Wikipedia page to confirm my understanding of the joke and found these very interesting historical uses.

[–] flambonkscious@sh.itjust.works 1 points 2 months ago (1 children)

Ha🤣, that's great (once I was already thinking in binary/non-Dec numerals)

[–] vrek@programming.dev 4 points 2 months ago

There is another joke there regarding the movie nightmare before Christmas but I'm not smart enough to figure it out.