How to calculate the weekday of any date in your head

[bed147373429]

All it takes it to remember 12 single-digit numbers and reading through a blog post for 5 minutes! :)

[McNutty]

What is the year code for 1947? For 1976?

[bananabiscuit]

Do you also have to account for leap years somehow? I think on leap years you need to add one to the month code for all months except Jan and Feb.

[bed147373429]

Hi, thanks for this question! On leap years the code for January and February is decreased by 1. Everything else stays the same! I updated the blog and the Go code to take care of this.