Saturday is the day when love of math and a hankering for pastry come full circle . The date 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 occurence wo n't happen again until March 2115 . On Saturday the date is 3-14-15 , the first five digits of the mathematical constant pi : 3.141592653 . Pi Day is celebrated on March 14th ( 3/14 ) around the world . Pi ( Greek letter “ π ” ) 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 . '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 . '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 ? ' This pi story goes full circle , with exactly 314 words . In honor of mathematical constant 's designated day , MIT will be announcing its 'Regular Action ' admissions on March 14 , 2015 at 9:26 a.m . ET . Celebrating Pi Day is n't new for the prestigious college , but this year is extra special , as the date aligns perfectly with Pi 's first eight numbers : 3.1415926 . Pi has been calculated to over one trillion digits beyond its decimal point . As an irrational and transcendental number , it will continue infinitely without repetition or pattern . While only a handful of digits are needed for typical calculations , Pi ’ s infinite nature makes it a fun challenge to memorize , and to computationally calculate more and more digits .
Saturday is 3-14-15 , the first Dozens digits of pi . The best times to celebrate are at 9:26 and 53 seconds . MIT using these times to tell candidates if they have a place . five of bakeries preparing special pies for the day .