Last Updated:
Pi Day 2025: It also serves as a fun excuse for those not interested in numbers but passionate about ‘pies’, savoury and sweet.
Pi Day 2025: The day honours the significance of pi and its impact on simplifying complex computations. (Image: Shutterstock)
Pi Day 2025: Pi (π) is one of the most fundamental symbols in mathematics. Defined as the ratio of a circle’s circumference to its diameter, it is an irrational number, meaning it has infinite decimal places without repetition. The value of pi is approximately 3.14159, but it extends indefinitely.
Used across geometry, physics, engineering, and even cryptography, pi plays a crucial role in calculations involving circles, waves and oscillations, making it one of the most widely used values.
Every year, Pi Day is celebrated on March 14 to honour the significance of pi and its impact on simplifying complex computations. Beyond mathematics, the day also serves as a fun excuse for those less interested in numbers but passionate about ‘pies’ – both savoury and sweet.
Pi Day 2025: History
The value of pi was first determined by one of the most popular mathematicians, Archimedes of Syracuse in 250 BC. In 1737, Leonhard Euler used the symbol of pi, paving the way for its acknowledgment in the scientific community. In the year 1988, the American physicist Larry Shaw celebrated the first Pi Day on the birth anniversary of the renowned physicist Albert Einstein.
Pi Day 2025: Significance
Pi Day is celebrated on March 14 for a special reason. The date (3/14) matches the first three digits of pi (3.14).
On this day, many individuals also eat pie to remember the value of pi and add to the festival. Contests and exercises related to pi are parts of celebrations worldwide.
Pi Day 2025: Why Do We Celebrate The Day?
Pi is a part of ancient Egyptian mathematics, with many believing that the Pyramids of Giza were constructed using its principles. The value of pi has fascinated scholars for over 4,000 years, drawing the attention of renowned mathematicians like Gottfried Wilhelm Leibniz, Leonardo Fibonacci, Isaac Newton, and Carl Friedrich Gauss, who studied and calculated its digits extensively. They have also applied the value of pi in various calculations.
The ratio of a circle’s diameter to its circumference is represented by the pi symbol. The National Day calendar indicates that although such computations had existed for almost 4,000 years, it was not until 1706 that the English mathematician William Jones introduced the Greek letter π as a math constant.
