3.14: National Pi Day

Graphic of the Pi symbol


National Pi Day is observed annually on March 14th. Pi Day is the official day to celebrate the mathematical concept of π (Pi). The first three digits of pi are 3.14. In 2009, the United States House of Representatives supported the designation of Pi Day.


The earliest known official, or large-scale celebration of Pi Day, was organized by Larry Shaw in 1988 at the San Francisco Exploratorium. The Exploratorium continues to hold Pi Day celebrations.


There are various ways to celebrate National Pi Day.  Here are some suggestions: 

  • Eating a slice of pie
  • Pie eating contests
  • Discussing the significance of the number π
  • More recently watching Life of Pi

Finding 3.14 deals in as many version of π as possible.  For example,

  • Half.com is offering 95 % off the paperback of The Life of Pi.
  • BJ’s Restaurant & Brewhouse: One mini-pizza with one topping for $3.14, dine-in only. bjsrestaurants.com/piday
  • California Pizza Kitchen: Get a slice of Key Lime Pie for $3.14. The offer is good for dine-in or takeout orders at participating locations, but not for third-party deliveries. cpk.com
  • Corky’s Kitchen & Bakery: Slices of pie for $3.14. corkyskitchenandbakery.com
  • Fresh Brothers: Get one personal pizza for $3.14 using the promo code PIDAY. freshbrothers.com
  • Marie Callender’s: Free slice of pie with the purchase of an adult entree and a coupon. mariecallenders.com/coupon-piday
  • Pie Bar: This Long Beach restaurant will throw an all-day patio party with a pie-eating contest, $3.14 sangria and slices of Key Lime Pie for $3.14. The first 50 guests to say “Pie is the answer” will get a complimentary Key Lime Pie shot with a souvenir glass. thepiebarlongbeach.com
  • Pie Hole: Key Lime minis, Pie Hole bundles of four and the Einstein Blue Lemonade will be on sale at $3.14. Guests who make $5 in purchases can enter a raffle for various prizes, one being a whipped cream pie in the face. thepieholela.com
  • Pieology Pizzeria: Guests can buy one thin crust pizza and get a second one for $3.14, and members of the Pie Life loyalty club get a $2 reward for their next visit. There will also be a cheese-pulling photo contest on Instagram for the chance to win a $50 gift card by using the #perfectpieologypull hashtag. pieology.com/pie-life