It’s the most wonderful time of the year—for mathematicians, anyway.

Pi Day is Saturday, March 14. The relatively new holiday is a celebration of the mathematical calculation pi, or the infinite number representing the constant ratio of a circle’s circumference to its diameter. Pi is essential to engineering and modern construction.

Although many sought to find it, the calculation of pi, which is also expressed by the fraction 22/7, is commonly credited to Greek mathematician Archimedes of Syracuse more than 2,200 years ago.

According to History.com , physicist Larry Shaw founded Pi Day day in 1988, selecting March 14 because the numeric date represents the first three digits of pi (3.14). It also happens to be Albert Einstein ’s birthday.

The first Pi Day took place at the Exploratorium, a San Francisco–based science museum, and featured a circular parade and fruit pies. The latter has become a delicious tradition among academic and office settings. In 2009, the U.S.…