circafuturumJul 15
Liam 

I have a document from the late 19thC that is dated Saturday 17th October but I don’t know the year, and this has introduced me to the Doomsday Rule and this is wild

https://en.m.wikipedia.org/wiki/Doomsday_rule

‘The algorithm is simple enough that it can be computed mentally. Conway could usually give the correct answer in under two seconds.’

Doomsday rule - Wikipedia

Jul 15 at 4:09amWeb
Show threadDeborah PickettJul 15
@liamvhogan For a brief time in high school this was a party trick of mine. Got a co-student who was interested in politics to pick a date he knew the day of week of, I worked it out in a couple of minutes as Saturday. He said it was an Australian federal election, so I won.
Show threadLiam Jul 15
@futzle
Show threadKen ButlerJul 20
@futzle @liamvhogan had I known this, it would have been a party trick of mine in high school also.
Show threadGoodNewsGreyShoes🔞Jul 15

@liamvhogan "See that's how they get you: give it a flashy name like 'doomsday equation' so you look it up & learn it's *actually* about days of the week eight hundred years ago. Thirty minutes later you're knee-deep in algebra asking your friends to throw random dates at you!"

"Math: not even once."

Show threadTanyaJul 15
@liamvhogan thank you for sharing this! Guess I know what I’m doing this afternoon.
Show threadflogallamaJul 15
@liamvhogan this made my day!
Show threadAidanJul 15
@liamvhogan TL;DR
Show threadKen ButlerJul 20
@liamvhogan from memory, "I work from 9 to 5 at the 7-11" (meaning, 9/5, 5/9, 7/11, 11/7, whichever way around you do your dates, are all the same day of the week).