What is Pi Day?

“Pi Day is celebrated on March 14th (3/14) around the world. Pi (Greek letter “”) 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. Pi has been calculated to over one trillion digits beyond its decimal point. Pi Day was founded by Physicist Larry Shaw in 1988.”

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Who was born in Pi Day other than your friend?

“Albert Einstein was born on March 14, which is also celebrated as Pi Day, honoring the ratio of the circumference of a circle to its diameter, otherwise known as the mathematical constant π. One of science’s greatest minds of all time, Albert Einstein, was born on March 14, 1879, at his family’s home in Ulm, Germany.”

What is a Pi?

Pi is defined as the distance around a perfect circle, or the circumference, divided by the distance across it, or the diameter. It is also involved in calculating the area of a circle, the volume of a sphere, and many other mathematical formulas you might need in the sciences. The celebrated irrational number that never ends is 3.1415926535897932384626433832795. If you want to appreciate what it looks like to 10 THOUSAND digits, click here.

Who invented the Pi?

“In 1706 a little-known mathematics teacher named William Jones first used a symbol to represent the platonic concept of pi, an ideal that in numerical terms can be approached, but never reached.”

Why is the value of Pi 3.14?

“Succinctly, pi–which is written as the Greek letter for p, or –is the ratio of the circumference of any circle to the diameter of that circle. Regardless of the circle’s size, this ratio will always equal pi. In decimal form, the value of pi is approximately3.14.”

What’s a delicious way to celebrate Pi Day?

Every year on March 14, we celebrate Pi Day, an unofficial but increasingly popular holiday. There are plenty of fun ways to observe the nerdy occasion, like reciting the number up to a certain decimal, wearing shirts with math equations or puns (you’ll see more pictures later, I promise!),

and of course, enjoying a freshly baked pie. The excuse to eat pie on this day may not be entirely rational, but then again, pi is an irrational number. You can savor Pi Day at any bakery shops and pizza pie shops (like the one below)(taken from Mercury News)

  • The Blaze Fast-Fire’d Pizza chain is offering its custom-made 10-inch pizzas for the price of $3.14.
  • To take advantage of Pielogy Pizzeria’s $3.14 deal, sign up online to join the company’s Pie Life club. Must be 13 or over to participate, and the online club membership comes not just with a $3.14 Pi Day 10-inch pizza but also a free custom pizza on your birthday.
  • How about Domino’s and Pizza Hut? Please call them first!
  • All Whole Foods Markets will offer savings of $3.14 off any large pie from their bakery, plus $2 off large take-and-bake pizzas.
  • Even rotisserie chicken specialist Boston Market is getting in on the action. Show their Pi Day coupon on your phone or print it out and you’ll get a free chicken pot pie with the purchase of an individual meal and a drink. Download the coupon from

Calling Mr. Schechter!!! How about writing a song about Pi?

 How can you memorize the numbers in a Pi?



“When is a letter actually a number? In this BrainPOP movie, Tim and Moby introduce you to the magical little number called pi! Discover where the concept of pi comes from, what ratio it represents, and why all circles have it in common. You’ll also find out why we use a Greek letter to represent the number, what an irrational number is, and why irrational numbers can’t be written as fractions. Best of all, you’ll figure out how to use pi to find the circumference and the area of a circle. Those ancient Greeks sure were smart!”

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