"It is an irrational number, which means that it cannot be expressed as a fraction m/n, where m and n are integers and its decimal representation never ends or repeats. Indeed: beyond being irrational, it is a transcendental number, which means that no finite sequence of algebraic operations on integers (powers, roots, sums, etc.) could ever produce it. Throughout the history of mathematics, much effort has been made to determine Ï€ more accurately and understand its nature; fascination with the number has even carried over into culture at large."
So, in the name of all that is Pi, go out today and eat a big piece of your favourite Pie.
Coconut cream, Rasberry, Chocolate, Peach whatever your fancy.
And have a happy Pi Day.