Loading…
October 9, 2023 was a Monday — that’s 1,021 days ago. Below you can see exactly how to work the weekday out in your head with the Doomsday algorithm, along with a few other facts about the date.
Same month, one different day. You already know October 10 is a doomsday — count from there.
October 20, 2023
The Doomsday algorithm is six short steps. Most people get to a reliable answer in under 30 seconds after an afternoon of practice.