4 ms·
If you want to do it in your head, there's Conway's Doomsday Rule: https://en.wikipedia.org/wiki/Doomsday_rule https://en.wikipedia.org/wiki/Doomsday_rule
by kej 11y ago
If you want to do it in your head, there's Conway's Doomsday Rule: https://en.wikipedia.org/wiki/Doomsday_rule https://en.wikipedia.org/wiki/Doomsday_rule