Most people learn about Pi in middle school, that famous irrational number that mathematicians have dubbed as one of the most important numbers in the world. There is even a National Pi Day in honor of the digit, but some people are starting to say that Pi has given all the satisfaction it can.
Unlike Pi, which is the number you get when you divide the circumference of a circle by its diameter, Tau is the number you get when you use a circle's radius. It is twice as much as Pi at 6.28, and in its honor, today, June 28, is National Tau Day.
Anti-Pi proponents seem to think that using Tau is the more logical choice because circles are more naturally defined by their radius than by their diameter.
The argument about whether or not Pi is relevant is still being debated and probably will be for awhile. So for those of us who don't want to get in the argument we can just sit back, relax and listen to the musical stylings of Michael John Blake, who opened our ears to what Pi, and now Tau, sounds like. So happy Tau day everyone!