Pi is a transcendental number. It is described as a ratio of a circle's circumference to its diameter. The value of Pi is 3.14. It is infinite in length. Due to its neverending nature, a special day is dedicated to celebrate its uniqueness. The day is termed Pi day. It is celebrated on March 14. The date indicates its value, i.e., 3rd month and 14th day. Pi is defined as a "constant value in math to represent a ratio of a circumference of a circle to its diameter, which is about 3.14". This irrational number is represented by the Greek letter "π".
History of Pi Day
Pi was first used to figure the circumference of a circle around 40 centuries ago by the Babylonians. The first computation of π was done by a great mathematician, Archimedes, between 287–212 BC. He approached the area of a circle by a theorem called the Pythagorean Theorem to estimate the areas of two regular polygons. The two polygons are described a s follows. The polygon inscribed within the circle and the polygon within which the circle was circumscribed. As the area of the circle lies between the areas of the inscribed and circumscribed polygons, we got the upper and lower bounds for the area of the circle. As he had not derived the value of π but only an approximation within those limits. Archimedes confirmed that the value of π is between 3 1/7 and 3 10/71. In the 1600s, Isaac Newton used infinite series to get more accurate numbers. π, a symbol to represent Pi, was invented by British mathematician William Jones in 1706 for representation of the ratio and later, it was popularized by the Swiss mathematician Leonhard Euler. In 1988, the Exploratorium museum of science, art and human perception in San Francisco had the honour to hold the first Pi day celebrations. It was organized by a wellknown physicist Larry Shaw. US congress officially declared March 14 to celebrate the significance of "π" day on March 12, 2009.
Pi Day 2022 Date

When is Pi Day 2022?
Pi Day for the year 2022 is celebrated/observed on Monday, 14 March.

Pi Day dates for the years 2022, 2023, 2024, 2025, and 2026, 2027, 2028, 2029 and 2030
Fun Holiday: Pi Day Observances  

Year  Weekday  Date  Name 
2022  Mon  14 Mar  Pi Day 
2023  Tue  14 Mar  Pi Day 
2024  Thu  14 Mar  Pi Day 
2025  Fri  14 Mar  Pi Day 
2026  Sat  14 Mar  Pi Day 
2027  Sun  14 Mar  Pi Day 
2028  Tue  14 Mar  Pi Day 
2029  Wed  14 Mar  Pi Day 
2030  Thu  14 Mar  Pi Day 
Significance of Pi Day
Pi plays a significant role in the calculation of the circumference of a circle and a circle can be observed in various fields such as science  statistics, fractals, thermodynamics, mechanics, cosmology, number theory, and electromagnetism, Trignometry, nature – ocean waves, light waves, mountains by series of circles. Not just this, even NASA uses in the various calculation.
Celebration of Pi Day
The existence of the interesting and mysterious constant is celebrated all over the world by students, teachers, mathematicians and fans of Pie.
Why fans of Pie?
Pi and Pie are homophones. Therefore, few of the enthusiasts celebrate by eating and sharing Pie on Pi day. Pi day is celebrated on an international level by eating all kinds of pies. Without any exceptions, people may try meat pie, chocolate pie and what not! It is a golden opportunity for Bakers to exhibit their baking creativity by preparation of various kinds of pie on Pi day. The most common ways of celebrating are by participating in a baking competition at the workplace, preparing Pies or pieeating competitions, sharing math jokes, throwing fun math puzzles with a distribution of rewards for the winners. Not just this, NASA celebrates Pi day across the US nation.
Let us look at the significance and ways of celebrations in different nations.

China
Zu Chongzhi, a Chinese mathematician and astronomer, determined the transcendental number value with an accuracy of seven decimal places, between 3.1415926 and 3.1415927. His analysis remained the most accurate for nearly 1,000 years until the 14th century. Zu made contributions in both the fields; a lunar crater and an asteroid bear his name; a high school was named after him in north China.

Japan
In Japan, it coincides with the celebration of "White Day," the Far East's formal equivalent of Valentine's Day, but this one is only for the ladies.
Pi has inspired a competitive sport: Pi memorization, where practitioners recite as many digits in Pi from memory. Akira Haraguchi, 69, from Japan, has set a new record by reciting 100,000 digits in public – which took him 16hr 30min.

Pakistan
In 2021, Aga Khan University Institute Educational Development organized a mathematics teachers' conference, providing teachers with a platform to demonstrate their analytical and problemsolving skills in the subject. Professionals from various educational institutes including private, government, communitybased, and Madrassa school systems in urban and rural settings in Pakistan, India, and East Africa participated in the conference. Due to Covid19 restrictions, the conference was held online. Three hundred teachers shared video clips demonstrating how mathematics can be used in our daily lives. After careful evaluation by a panel of experts, selected videos were shown on the conference day.

Bangladesh
The day was observed for the first time in Bangladesh in 2006. World mathematics week celebrated in 2015, from March 14th20th with Pi day to begin. As a part of celebrations, many organizations had organized various types of events to celebrate the week. Neutrino ACC Science Club of Adamjee Cantonment College conducted 'AllTime NASC Math week. Olympiads on Math, Physics, Biology, Chemistry including Math quiz, Math using no calculator, Rubik's Cube, Math fiction writing etc. were organized, and the winners of these events were given prizes.
Theme of Pi Day 2022
Every year, a theme is assigned to the celebration of Pi day. Likewise, the Theme assigned for 2022 is Mathematics Unites.
Some Interesting Facts
 This day is also known as the international day of mathematics.
 March 14 is also the birthday day of a great mathematician and physicist, Albert Einstein too.
 Few of the bakers and nonbakers too offer amazing deals on this day: check out offers set by Bubby's, Southern Baked Pie Company, First Methodist Church, Signal Station Pizza, Paiku, The Pie Hole, Cracker Barrel, Cici's Pizza Buffet, Fireman Derek's Bake Shop, Grand Traverse Pie Company, Patxi's Pizza, Marco's Pizza, Kroger and the list goes on.
 There is another day dedicated for Pi, the Pi approximation day celebrated every year on July 22. Also known as casual Pi day. Decimal value of Pi never stops or repeats. It has been a mystery to reach an end.
 Stephen Hawking, a theoretical physicist, passed away on one of the Pi days.
 2015 was special for Pi day as the date was 3/14/15, even closer to the value of pi, which begins at 3.1415.
 Pi is also used to calculate the motion of pendulums, vibrations of strings, alternating electric currents.
 Pi is not just related to geometry but also mathematics. It is used to obtain the radius of a circle. Various models of Pi calculation were introduced, of which few are listed below.
 Infinite series
 Monte Carlo Simulation
 Computer way of Pi calculation
 Apart from this, Indian Mathematician Srinivasa Ramanujan had his own theory for the calculation of PI.
Therefore, it is fun and important to chase such a mystery. What are you waiting for? Grab a few delicious pies and enjoy them while watching movies with friends and family. Not just that, create memories by participating in interesting quizzes, sharing jokes and baking a few and send us ;).
Happy Pi day!!