Happy Pi Day

The mathematical constant π is an irrational real number, approximately equal to 3,14159, which is the ratio of a circle's circumference to its diameter in Euclidean geometry, and has many uses in mathematics, physics, and engineering.

Pi Day openly promotes the celebration of mathematics education, the collective enjoyment of mathematics, and the ageless, multicultural interest in pi. Educators, students, and parents are encouraged to join together in a variety of public activities, expressing in imaginative ways, their passion for the longstanding creative nature of mathematics.

Here you can find a lot of sites where you can know more about pi and find fun about pi.