Pi Day is held to celebrate the mathematical constant π (pi).
Pi Day is observed on March 14 (3/14 in American date format), due to π being equal to roughly 3.14. Sometimes it is celebrated on March 14 at 1:59 p.m. (commonly known as Pi Minute). If π is truncated to seven decimal places, it becomes 3.1415926, making March 14 at 1:59:26 p.m., Pi Second (or sometimes March 14, 1592 at 6:53:58 a.m.). Pi Approximation Day may be observed on any of several dates, most often July 22 (22/7 (European...

Picture this:
You are standing on a conveyor belt. It is carrying you down a long hallway. Each side of the hallway is lined with closed doors with small signs hanging on them.
The messages on the signs are something you need to pay close attention to. The speed of the conveyor belt is not fast--slow enough for you to get off and enter any one of the doors.
You realize that you have passed a door forever.
Looking down the hallway, you see that the belt is going towards...