Happy Pi Day! March 14 is a day that's celebrated both by math lovers and those who enjoy tasty slices of pie. It's a day to honor the ratio of a circle's circumference to its diameter, which is 3.14159265359 (and so on to infinity) and often rounded to 3.14.

Pi Day took off in 1988 when physicist Larry Shaw celebrated the symbol at the San Francisco Exploratorium, where he worked. Shaw and the staff reportedly “marched around a circular space" and then enjoyed some fruit pies afterwards. The U.S. House of Representatives recognized March 14 as National Pi Day in 2009.

Pi Day 2016 Deals Enjoy a slice pie or pizza on Pi Day 2016. Pictured: Slices of pumpkin pie on a table during the Great Thanksgiving Banquet on Nov. 25, 2015, in Richmond, California. Photo: Getty Images

You don't have to be a math genius to participate in Pi Day 2016. Many outlets are offering free slices of pie, discounted pizza pies and even deals on electronic items like Dell laptops. Check out some of the offers and deals available on Monday:


  • Delightful Pastries in Chicago will be offering apple, cherry and rhubarb pie for $3.14 a slice. At 3:14 p.m. CDT the first customer at the location will get a free slice.
  • The Grand Traverse Pie Company in Michigan and Indiana is offering a free slice of Michigan ABC Pie with any purchase all day on Monday.
  • In Washington, D.C., Bayou Bakery  is selling $3.14 slices of its Girl Scout Cookie Mint Chocolate Pie. The pie is inspired by both Thin Mints and St. Patrick's Day.
  • Bojangles will give customers the opportunity to buy three baked sweet potato pies for $3.14. The chain is located in 11 states from Pennsylvania down to Florida.


  • Pizza Hut will have a contest Monday set up by Princeton University professor John H. Conway where customers will have the opportunity to win free pizza for 3.14 years or a value of around $1,600. All you have to do is solve three math problems and submit your answers to them in the comments section. Click HERE for your chance to win free pizza.
  • Buy any pie for $3.14 (limit one per person) at Blaze Pizza.
  • The chain Your Pie is offering $3.14 individual pizzas, combo meals and beers.


  • The Economist's GMAT and GRE preparation division is offering 20 percent off GMAT and GRE products. Click here for more information on GMAT products and here for GRE information.
  • Whole Foods will offer $3.14 off sweet pies and $2 off take and bake pizza on Monday. Check with your local store to see if they are participating.
  • Kaplan Test Prep is offering $250 off LSAT instruction courses in honor of Pi Day. The sale lasts until midnight on March 14. The promo code is PIDAY250.
  • Amazon is offering up to 70 percent off of SanDisk Flash Drives and SD Cards as part of the site's "Deal of the Day."
  • Microsoft is giving customers the opportunity to save 31.4 percent on select Dell laptops on Monday. The three included are the XPS 13, Inspiron 13 and the Inspiron 15.