Pi Day…..
Commemorating the mathematical constant π (PI). Pi Day is celebrated on March 14, because it represents 3.14, the first three digits of PI, which is the ratio of a circle’s circumference to its diameter.
The lower case π is the 16th letter of the Greek alphabet and is pronounced “pie” and represents the first letter of the Greek word perimetros, meaning circumference. The first recorded use of π to represent pi is Oughtred’s “δ.π”, to express the ratio of periphery and diameter in the 1647 edition of Clavis Mathematicae. The first recorded use of the π symbol alone to represent the value of pi was by Welsh mathematician William Jones in his 1706 work Synopsis Palmariorum Matheseos; or, a New Introduction to the Mathematics. Albert Einstein was born on March 14, 1879 and Stephen Hawking died on March 14, 2018.