Does Pi Day have an end?

Pi Day doesn’t have an end because though Pi technically isn't infinite, it doesn't fully end in a mathematical sense. Pi, formally known as π, is the ratio of the circumference of a circle and the diameter of a circle.

What is the infinity of Pi?

But that long history is nothing compared to the infinity of pi itself. A refresher for those of you who have forgotten your seventh-grade math lessons 1: Pi, or the Greek letter π π, is a mathematical constant equal to the ratio of a circle’s circumference to its diameter — C/d. It lurks in every circle, and equals approximately 3.14.

What does Pi mean in math?

A refresher for those of you who have forgotten your seventh-grade math lessons 1: Pi, or the Greek letter π π, is a mathematical constant equal to the ratio of a circle’s circumference to its diameter — C/d. It lurks in every circle, and equals approximately 3.14. (Hence Pi Day, which takes place on March 14, aka 3/14.)