When most people think of the word “pie” they think of the warm, delicious dessert, but on March 14 people will be celebrating the mathematical constant around the world.

Pi is the ratio used to compute the circumference, area and volume of circles. The first ten digits of Pi work out to be 3.141592653, therefore Pi Day is celebrated 3-14. Pi is interesting in part because it’s an irrational number. That means it continues indefinitely, without repetition or pattern.

National Pi Day is celebrated many different ways depending on the love for the irrational decimal. One way pi day is celebrated is that math lovers wear clothing decorated with the pi symbol, eat pie and even throw pi-related parties.

Even though this year’s Pi Day will have many different festivities, next year will be even more exciting. Hardcore Pi Day celebrants are planning special events for 9:26:53 a.m. on March 14, 2015, as the numerical date 3/14/15 9:26:53 represents the first 7 digits of pi. Pi Day was first celebrated in 1988 and will continue to be celebrated throughout the years.