Many people don’t know March 14 is more than just another day on the calendar.

It’s the day that math enthusiasts celebrate pi, or the ratio of the circumference of a circle to its diameter.

The number is the same for every circle and goes on and on forever, as students found out Wednesday during a Pi Day celebration at the Oak Manor Sixth Grade Center in Niles.

“3.14159,” said Oak Manor student Madeline Gattis. “That’s all I can memorize right now.”

Gattis is a member of Oak Manor’s Math Olympiad team, which is a group of students that meet after school to practice high-level math problems. Math Olympiads also compete against other Math Olympiads across the country several times a year.

Math Olympiad students such as Gattis helped lead a discussion on pi with their classmates.

They shared several pi facts, including that Albert Einstein was born on pi day in 1879.

They read a book about pi out loud in class called “Sir Cumference and the Dragon of Pi.”

They even shared a joke about pi. Here’s how it went: What do you get if you divide the circumference of a jack-o-lantern by its diameter?

The answer: Pumpkin pi.

“This is a fun way for the kids to learn more about pi,” said Oak Manor teacher Amy Scott.

Students were also treated to 300 pi-shaped cookies made by Coleman Cakes in Niles.

This is the first year the whole school took part in Pi Day. Scott said they hope to celebrate Pi Day every year.