Saturday is the day when love of math and a hankering for pastry come full circle . Saturday is Pi Day , a once-in-a-year calendar date that this time squares the fun with a once-in-a-century twist . Math nerds all over the world will be celebrating with pizza specials , romantic outings , and mathtastic special events . Saturday is 3-14-15 , the first five digits of the mathematical constant pi : 3.141592653 . Pi day ! : Students from the Maurice J. Tobin School makes a human Pi symbol at the school in Boston during a celebration of Pi Day in 2007 . The best times to celebrate are at 9:26 and 53 seconds , morning and evening . The next time that happens is in March 2115 . 'It 's a portal into this magical mysterious world of mathematics , ' said University of California Berkeley mathematician and author Edward Frenkel . 'Pi is special . ' Pi is the constant used to calculate the area of a circle , as in pi times the radius squared , but it appears all over other parts of mathematics . It 'is kind of a basic atomic building block '' for math , said Temple University mathematician and author John Paulos , who was interviewed at precisely 3:14:15 p.m . In some places , Pi Day is celebrated with the edible type of pie . eat your numbers : To celebrate Pi day ( the math constant and March 14 or 3-14 ) , Wanda 's Pie in the Sky , owned by Wanda Beaver made these pies in 2011 . 'It 's a real exciting moment for math enthusiasm , ' said Nathan Kaplan , a Yale University math professor , who called it a time for people to 'remember how much fun they found some of the stuff in school . ' Kaplan acknowledged that most people do n't really recall math as fun , blaming that on how it 's taught : 'There 's fun stuff out there in the quantitative world . ' One interesting aspect of pi is that it is irrational , which means the decimals after 3 go on to infinity with no repeating patterns . Yet in 1897 , a bill before the Indiana legislature tried to round it up to 3.2 . It fell flat . 'We can not change it . It 's not subject to opinion or taste or time , ' Frenkel said . 'How many things like this in the universe mean the same thing to everyone through time and space ? ' Celebration : A pi-adorned Dominic Vitale watches a performance at Hanover High School during the 2011 celebration of Pi day . The wall Street Journal reports that Dana Emanuel and Byron Clarke decided to hold their wedding on the special day . The date wo n't come around again for 100 years , so the couple decided to send circular wedding invitations to family and friends . The nuptials are even in unison which their engagement date on June 28 last year — 6.28 , or two pi . 'The guests are really getting into and are able to laugh about it , ' said Clarke . 'It kind of plays into our personalities and humor will hopefully be a big part of the day . ' Baked goods : Hanover High School students participate in Pi Day activities in 2012 and made this tasty and dorktastic creation . Nice crust ! : To celebrate Pi day ( the math constant and March 14 or 3-14 ) , Wanda 's Pie in the Sky also made this baked good several years ago . 'Our friends are wacky like we are , ' joked Emanuel . Pie even coincides with some of the couple 's earliest dating memories , reports The New York Daily News . 'We won a dessert-making competition at a fundraiser for Blue Sky Bakery in October 2013 — and the prize was two pies ! Which , when written mathematically , is 6.28… ' the couple writes on their wedding website . In New York , Chicago , and other culinary states will be offering pizza deals on their 'pies . ' Over at Massachusetts Institute of Technology will let prospective students will learn if they 've been accepted beginning at 9:26 a.m. on Saturday . Students at schools across the country are celebrating with baked goods and fun events . What will you do to celebrate ? All over the world : British writer , essayist and autistic savant Daniel Tammet poses on March 14 , 2013 , at the Palais de la Decouverte , a science museum in Paris , as part of the first Pi Day in France .
Saturday is 3-14-15 , the first five digits of the mathematical constant pi : 3.141592653 . The best times to celebrate are at 9:26 and 53 seconds , morning and evening and the next time that happens is in March 2115. math enthusiasts Dana Emanuel and Byron Clarke decided to hold their wedding on the special day . Over at Sky will let prospective students will learn if they 've been accepted beginning at 9:26 a.m. on Saturday .