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.