Pi Day is celebrated on March 14th or 3/14, which represents the first three digits of the mathematical constant pi. The holiday originated in 1988 at the Exploratorium science museum in San Francisco and gained national recognition in 2009 when Congress designated March 14th as Pi Day. The date also coincides with Albert Einstein's birthday, adding to the significance of the day.

Pi is a mathematical constant that represents the ratio of a circle's circumference to its diameter. It is an irrational and infinite number, meaning it goes on forever without repeating. Pi is a fundamental concept in mathematics and is used in various fields such as physics, astronomy, and engineering.

Pi has many practical applications in different industries. It helps in calculating the size of cylinders for refinery equipment, determining paper roll sizes for printers, and measuring the necessary scale of tanks in heating and air conditioning systems. NASA relies on pi for calculating orbits, spacecraft communication, rocket propulsion, and parachute deployment during space missions.

Illustration: www.deliciousmagazine.co.uk

Pi Day is celebrated with various events and activities. The Exploratorium in San Francisco organizes a parade and festivities, including enjoying lots of pie. Many colleges and universities also hold events, such as mental math games and free pizza. Pi Day provides an opportunity to celebrate math and recognize its importance in everyday life.

The infinite number pi played a significant role in the breakthrough theories of renowned scientists like Albert Einstein and Stephen Hawking. Pi Day serves as a celebration of their contributions to the field of science and mathematics.