Today: 03.14.15... (US notation)

The Pi Day FEATURED REPORT Irrational Exuberance: How Will You Celebrate the Pi Day of the Century? Send us pix of your pies, pizzas and parties in honor of math (and circular baked goods) Read More

Top StoriesOBSERVATIONS MORE SCIENCE American Pi: Why the Day Belongs to the U.S. (and Belize)  Pi may be a universal constant, but only two countries can natively celebrate Pi Day: the U.S. and Belize. That's because they are the only ones (if Wikipedia is correct) to shorthand their date format so that it can match the first few digits of pi (3.1415), or March 14, 2015. ROOTS OF UNITY MORE SCIENCE Don’t Recite Digits to Celebrate Pi. Recite Its Continued Fraction Instead.  The digits of pi reciting contest is an all-too-common Pi Day event. And as this year is a once-in-a-century confluence of month/day/year with the first few decimal digits of pi, we might be in for more of those than usual. THE PI DAY OF THE CENTURY Why Killing Pi Would Make Math Simpler and More Beautiful  A growing movement argues that killing pi would make mathematics simpler, easier and even more beautiful