Pi Day is a lie: celebrate tau, the true circle constant instead

Today is Pi Day, perhaps the most popular of geeky holidays. Hooray. But I’m here to tell you that Pi Day is wrong — or rather, the entire idea of pi as a mathematical concept is wrong.
It’s easy enough to see why people like Pi Day: the whole thing starts with a mathematical pun of sorts (The date is written as 3/14 in American notation. Pi starts with the digits 3.14. You get it.) It’s an easy, fun ritual to see how many digits you can pointlessly memorize of the famou