Once every century, the month, day and year align to be exactly pi, the mathematical constant defined as the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159. Round that number up to 3.1416 and you can celebrate Pi Day twice in the same century, and the Gannon University's Math Club is doing just that with a Pi Day party on March 14, 2016.

Gannon's Pi Day party will take place at 7 p.m. on Monday in room 101 of the University's Zurn Science Center, 143 W. 7th St., and will feature savory (pizza), and sweet pies, the latter baked by Math Club students and Gannon mathematics faculty, and a screening of "Flatland," the 2007 animated short film based on the 1884 science fiction novella "Flatland: A Romance of Many Dimensions" by Edwin A. Abbott.

Attendees can enter a contest to remember pi expressed to the most decimal places (for which the end has not been reached), and there will be math games.

David Prier, Ph.D., assistant professor of mathematics, described the event as "a fun opportunity for students and their guests to get together and have a good time."

Pi may be an irrational number (that is, it cannot be expressed exactly as a fraction), but Pi Day is a rationally good time.