I've been feeling irrational, but no wonder, it's Pi Day. This doesn't explain why I feel this way on other days, but I'll take what I can get.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhg0iG06SaffwhLGI8rjpev30SX0AMBLW9P4sFZWyfPCNHzMuHFbpS14k-tFSnaYAaNB60WKj-eqTPAGN-rksJqd-xpg14PswINq7oDI-Muy9rOqguJBIYoNXzJaUBOFObHQqtJk7Y6GY5O/s320/pidaylogo.png)
Pi isn't just about circles--it comes up in all kinds of odd places--but as a practical cyclist, I particularly appreciate the circle. Pedaling polygons is no fun.