Every year on March 14, the world celebrates Pi Day to recognise the mathematical constant, Pi. It defines as the ratio of a circle's circumference to its diameter and the value for Pi is 3.14.diameter and its value is 3.14. The day was recognised in 1988 by physicist Larry Shaw as he organised a large-scale celebration at the San Francisco Exploratorium in the United States. In 2019, Unesco’s 40th General Conference decided to observe Pi Day as the International Day of Mathematics.


For people who follow the month/date format, March 14 represents the value of Pi. March is the third month of the year, which is also the initial number of the value. The following number is 14, hence the March 14 date. Maths enthusiasts across the world hold fun events on this day to mark the celebrations. They also eat pie as part of the celebrations due to the words being homophones in English (Pi and Pie) and circular shape.

Here are some more fun facts about Pi:

1) Pi is an irrational number. If calculated the number value can go on forever.

2) We can never know the accurate circumference of a circle as the exact value of Pi can also never be calculated.

3) Pi Day also coincides with the birth anniversary of scientist Albert Einstein. Widely renowned theoretical physicist Stephen Hawking died on this day in 2018.

4) Mathematician Isaac Newton, who is also the father of calculus, calculated the value of Pi to at least 16 decimal places.

5) There is an entire language made from Pi. In 2010, software engineer Michael Keith published a book names 'Not a Wake' in Pi language.

What is Pi Day?


March 14 marks Pi Day, an annual celebration of the mathematical sign pi. Founded in 1988 by physicist Larry Shaw, March 14 was selected because the numerical date (3.14) represents the first three digits of pi, and it also happens to be Albert Einstein’s birthday—the perfect pi-incidence.

The first Pi Day celebration took place at the Exploratorium (Shaw’s place of work), a San Francisco-based interactive science museum, and featured a circular parade and the eating of fruit pies. The festivities have gotten larger each year, and now include webcasts and a virtual party in Second Life (an online virtual world). It wasn’t until 2009, however, that it became an official national holiday when the U.S. House of Representatives passed legislation.

Why all the fuss about pi? The Ancient Greek mathematician Archimedes is most commonly credited with being the first to accurately calculate the estimated value of pi. Since it is an irrational, transcendental number, it continues on to infinity—the pi-ssibilities are endless! The seemingly never-ending number needs to be abbreviated for problem solving, and the first three digits (3.14) or the fraction 22/7, are commonly accepted as accurate estimations.

In mathematics, this infinite number is crucial because of what it represents in relation to a circle—it’s the constant ratio of a circle’s circumference to its diameter. Pi is also essential to engineering, making modern construction possible.

Since the mid-18th century pi has also been represented by the Greek letter Ï€. In fact, the word “pi” itself was actually derived from the first letter of the Greek word perimetros, which means circumference.


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