Pi is the never ending number beginning with 3.14, representing the ratio of a circle’s circumference to its diameter. The number is celebrated every year on March 14, but Pi Day means something ...

"If you come in and buy a pizza or take it to go, we have coupons for $3.14 off your next purchase," said the owner of Riko's ...

Pi Day is an annual national celebration of the mathematical concept, which is the ratio of a circle’s circumference to its ...

Pi Day occurs on March 14, because the date is written as 3.14 in the United States. Pi is the ratio of the circumference of a circle to its diameter, or approximately 3.14 (its exact value is ...