Today is international Pi Day when math enthusiasts around the wold celebrate the famous constant Pi, equal to the ratio of the circumference of a circle to its diameter. The reason Pi Day is celebrated on March 14 is because its first 3 digits are 3.14 (Pi = 3.1415926535...) March 14 also happens to be Albert Einstein's birthday. Pi is an irrational number, meaning that the sequence of its decimal digits continues to infinity without repeating itself.
The favorite way of celebrating Pi Day among geeks are eating a pie while reciting the first hundred digits of Pi.
To celebrate Pi Day show how life would be different if Pi ruled the world. Some examples are - photoshop objects and animals shaped as Pi, show Pi in movies and paintings, etc.