SAN FRANCISCO -- Every March 14, mathematicians, scientists and math lovers around the world celebrate Pi Day, a commemoration of the mathematical sign Pi. That's because the date written numerically ...

Around the world, March 14 th (3/14) is recognized as the day to celebrate Pi, which, of course, is the ratio of a circle’s circumference to its diameter. The “earliest known” celebration of Pi Day ...

CORONA DEL MAR — Karina Grover wore a lime green T-shirt with the pi symbol, as she sat perched at a table covered in pi swag at Mathnasium. There was a pi coloring sheet, pi trivia, lime-green pi ...

A freshly decorated Key Lime pie rests on a counter in a busy bakery kitchen at Michele's Pies, Wednesday in Norwalk, Conn. Math enthusiasts and bakers celebrate Pi Day on March 14 or 3/14, the first ...

Math enthusiasts around the world, from college kids to rocket scientists, celebrate Pi Day on Thursday, which is March 14 or 3/14 — the first three digits of an infinite number with many practical ...