Today is the day on which we recognize the number "pi", the mathematical constant that is the ratio of a circle's circumference to its diameter. The constant, sometimes written pi, is approximately equal to 3.14159. It has been represented by the Greek letter "π" since the mid-18th century.
At our house, we usually celebrate by having chicken pot pie for dinner! (Get it? Pie? Pie! Pi!? ...*crickets*...*cough*...)
You can watch the annual pi drop at 1:59 p.m. (since 159 are the next three numbers in pi, after 3.14) at the following website: