It's a most auspicious holiday for math lovers. Saturday, March 14,

**2015**is**Pi Day**, a celebration of the irrational number that describes the ratio of a circle's diameter to its circumference.**Pi**is approximately 3.141592653, but it continues at random to infinity.In this manner, what is Pi Day and why do we celebrate it?

Pi Day is an annual celebration of the mathematical constant π (pi). Pi Day is observed on

**March 14**(3/14 in the month/day format) since 3, 1, and 4 are the first three significant digits of π.Why is it important to celebrate Pi Day?

The concept of

**pi**is**important**to mathematics because of its relationship to the circle; it is a constant representing the ratio of a circle's circumference to its diameter.What is the importance of Pi Day?

**Pi Day**is celebrated on March 14th (3/14) around the world.

**Pi**(Greek letter “π”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159.