*math holiday*is actually quite exciting, not just for math enthusiasts, but for the general population.) There are plenty of real-world connections to Pi Day, too. This makes Pi much more than just a math constant. Apart from Einstein's birthday, students can learn about the history and meaning of Pi, and how computers are used to calculate many of its digits. You are invited to celebrate Pi Day with our Irrational WebQuest. Try our in-depth lesson on Circumference of a Circle. We will also have plenty of fun on Facebook, too. Come and celebrate with us!