What is Pi Day? [Well,] Pi Day is celebrated annually on March 14th; it was chosen because numerically it represents the first three digits of pi: 3.14.
- In addition, Abc7, [mentioned how] Pi is a mathematical constant that represents the ratio of the circumference of a circle to its diameter. It is an irrational number, meaning its decimal representation goes on forever without repeating.
- Pi Day was first celebrated in 1988 by physicist Larry Shaw at the Exploratorium in San Francisco, and since then, it's increased in popularity each year.