Friday is Pi Day, a national celebration of the mathematical concept ... Sign up for NBC LA's News Headlines newsletter. But ...

Pi Day is celebrated on March 14th in recognition of the mathematical constant, Pi. Ways to celebrate Pi Day include ordering pie, hosting a pie-eating contest, and watching the movie "Life of Pi".

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.

Some restaurants are offering special $3.14 promotions this Friday. In honor of Pi Day, pizza chains and national restaurants are celebrating the sweet holiday with special promotions and even ...

On Thursday, Detroit celebrates 313 Day in honor of its iconic area code and many restaurants celebrates with $3.13 deals. Friday marks March 14, also known as Pi Day in the mathematical world ...

Friday, March 14 marks Pi Day, a celebration of the mathematical constant that (roughly) equals 3.14. And in a shining testament to the United States' willingness to use anything as an excuse to ...

Friday is Pi Day, a national celebration of the mathematical ... and local eateries offer pie-related deals. But we do have some ideas. It seems that the Egyptians used pi in the construction ...