So, what do you know about Pi? Well, according to the Pi Day site
"Pi, Greek letter (π), is the symbol for the ratio of the circumference of a circle to its diameter. Pi Day is celebrated by math enthusiasts around the world on March 14th. Pi = 3.1415926535…..and then, of course, there is the Pi Minute. This will occur on March 14 at 1:59 p.m. 3.14159...you get it.
With the use of computers, Pi has been calculated to over 1 trillion digits past the decimal. Pi is an irrational number meaning it will continue infinitely without repeating. The symbol for pi was first used in 1706 by William Jones, but was popular after it was adopted by the Swiss mathematician Leonhard Euler in 1737."
Today is also Albert Einstein's Birthday, which seems rather fitting.
And how to celebrate Pi Day? Well, with PIE, of course!