Pi, which is the ratio of a circle's circumference to its diameter, is celebrated with its own holiday on March 14.

WEST PALM BEACH, Fla. (AP) — Math enthusiasts around the world, from college students to rocket scientists, celebrate Pi Day, which is March 14 or 3/14 — the first three digits of an infinite number with many practical uses. Many people will mark the day with a slice of pie — sweet, savory or even pizza.

Years ago, the infinite decimal 3.14 or its Greek symbol pi was mostly known to math and science geeks, but now March 14 is also a day for tasty deals. Here’s a little history to whet the appetite. The first “Pi Day” celebration was held in San Francisco in 1988 when a physicist at the Exploratorium,

Pi Day, celebrated on March 14 each year, honors the mathematical constant π with plenty of deals on sweet and savory pies, making it a perfect day for math lovers and food enthusiasts.

Nonno’s Pizza at 1613 Richmond Ave will celebrate Pi Day with deals from 11 a.m. to 11 p.m. Friday. Dine-in pizza lovers can enjoy free games⁠, half-off wings⁠, drink specials⁠ and $10 cheese pizzas⁠.⁠

Pi, defined as the ratio between the circumference of a circle and its diameter, is what's known as an irrational number. Despite its ubiquity, not only across math but also in fields as varied as medicine,