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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Today marks National Pi Day in the United States and around the world. The holiday commemorates a timeless symbol beloved by many ...

What is Pi Day? Whether you love math or you're just into some good dessert, this Saturday should be a sweet treat for you.

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 ...

Pi Day,” which is March 14, 3.14, is a day meant to recognize the special, infinite number that can also be recognized by its ...