Flashbacks to a better internet

First make the change easy, then make the easy change.

McMindfulness Book Review

My dad, Ingolf Max, has a Wikipedia entry. (German only.) That’s it. That’s the story. And as good a reason as any to tell the Internet that I am proud of my parents. Not for making it onto Wikipedia, but for leading a life of curiosity.

How to use Bash shell arithmetic, along with the 'date' utilty, to calculate the phase of the Moon on a particlar day.