Unfortunately National "Pi" Day has nothing to do with food.†
It's an actual day to celebrate a numerical ratio.†
True mathletes around the world celebrate Pi Day every year on March 14. That's 3.14, as in the first few digits of Pi.
Pi is the symbol used in mathematics to represent a constant -- the ratio of the circumference of a circle to its diameter, which is approximately 3.14159.†
There are many ways of observing Pi Day, which include eating pie, discussing the significance of the number and more recently watching the Oscar winning Life Of Pi.†
The earliest known official Pi Day celebration was organized by Larry Shaw in 1988. The celebration was held at the San Francisco Exploratorium where Shaw worked as a physicist.
With files from CNN