To some people, Pi Day is about mathematics. To others, it’s an excuse to eat pizza. Either way, there will be celebrations on Friday, March 14. Pi is the ratio of a circle’s circumference to ...

Pi Day, the one-of-a-kind math holiday, is Friday, March 14, giving people a chance to nerd out and enjoy baked goods or pizza. The special holiday celebrates the mathematical constant pi (π ...

Friday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its diameter and equals 3.14... Schools and museums often plan events to ...