It's Pi Day!

3/14. Pi is thought of as 3.14. Today it's 3/14/15. Guess what the next two digits are? 15. So, 3.1415.

Cool.

We celebrate Pi Day every year by buying pies. It's a must. And, as you know, to calculate the circumference of that pie, we would need pi. It's a sign: we need pies on Pi Day.

And for something interesting if you like The Simpsons:

Pi and Four Fingers