What is the year code for 1947? For 1976?

Yeah this part is left out of the explanation

If you know the code for year x, you can quickly calculate the code for year x-1 or x+1. If you want to be able to quickly do this for any given year you would have to know the code for every year by heart. Today, I will write a small script that generates all these year codes so that you can at least have an overview and I will update the blog post. In order to impress people you need to learn a lot of year codes, but for everday usefulness it's enough to remember this year's code.

Your own conclusion paragraph states that the code for 2024 is 1, but your pre-calculated table says different.

Thanks, fixed