Pi is a mathematical constant whose value is approximately 3.14159. Hence this Pi day is celebrated on March 14^{th}. The reason being 3, 1, 4 are the digits in Pi, March is the third month of the year and 14 is the day. The term Pi is a Greek word and is denoted by the symbol “π” which is used to represent a constant.

Pi is the ratio of a circle’s diameter to its circumference. No matter the size of a circle, its diameter will always be roughly 3.14 times shorter than its circumference — without fail. This ratio, π, is one of the cornerstones upon which modern geometry was built.

For simplicity’s sake, it’s often boiled down to just two digits, 3.14, or the ratio 22/7. In all its glory, however, pi is impossible to wrap your head around. It’s is an irrational number, meaning a fraction simply can’t convey its exact value. Irrational numbers include a value or a component that cannot be measured against ‘normal’ numbers. For context, there’s an infinite number of irrational numbers between 1.1 and 1.100(…)001. They’re the numbers between the numbers.

The symbol for Pi has been in use for over 250 years. The symbol was introduced by William Jones, an Anglo-Welsh philologist in 1706 and made popular by the mathematician Leonhard Euler.

March 14 or 3/14 is celebrated as Pi day because of the first 3.14 are the first digits of pi. Many math nerds around the world love celebrating this infinitely long, never-ending number.

There is an interesting reason why the name ‘pi’ was coined. Before the name pi came, mathematicians had to say a mouthful. The only descriptive phrase they could use was “the quantity which when the diameter is multiplied by it, yields the circumference”. Pi was named pi by William Jones, a not-so-popular mathematician.

Physicist Larry Shaw started 14 March as Pi day at San Francisco’s Exploratorium. There he is known as the Prince of Pi.

Pi has a sacred bond with the circle. A circle’s angle spans 360 degrees around its center and it is a coincidence that the number 360 is at the 359th digit position of pi.

Even comedians use pi to make people crack at their jokes. John Evans, a comedian, once said in his performances, “What do you get if you divide the circumference of a jack-o’-lantern by its diameter? Pumpkin π.”

Many mathematicians believe that it is more accurate to say that a circle has infinite corners than it is to say that it has none. It is only reasonable to assume that this “infinite” number of corners correlates to the infinite number of digits of pi.

Many genius minds have a relation with the Pi day. Albert Einstein was born on Pi day. Stephen Hawkings died on 3/14, Pi day at the age of 76.

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