Exploratorium attendees show children how Pi is the ratio of a circle's circumference to its diameter during Pi Day in San Francisco, Thursday, March 14, 2013. (Exploratorium) Her parents told her ...

While the U.S. may have 11 official federal holidays, there are actually thousands of quirky, themed days that make the calendar a whole lot more fun! One of the best—and most delicious—is Pi Day.

Friday is the perfect day to celebrate your love of pie – it's Pi Day. Pi is the ratio of a circle’s circumference to its diameter. It's represented by the Greek letter π. And you thought ...

What is irrational, contains more than 200 trillion digits, and shares a special day with Steph Curry’s birthday? A middle school math teacher would be happy to teach you ...

Mathematician Dr. Steven Strogatz breaks down the history of the math concept and brings it full circle to recent science.

Free Pi Day event for kids with CAMP and Mathnasium Supreme Court declines to hear Trump donor's challenge to press freedom precedent Oldest US Aircraft Carrier Fills Pacific Power Gap With China ...

Pi Day is Friday, March 14 and Blaze Pizza, Marco's Pizza and others are celebrating with deals and discounts on pie and pizza.

Pi Day is March 14 and Round Table, California Pizza Kitchen and other California restaurants are celebrating with deals and discounts.

Pi Day was first celebrated in 1988 at San Francisco's Exploratorium, a museum of science and technology that encourages visitors to be hands-on.

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 ...