Pi Day is celebrated worldwide every year on March 14th. The emergence of Pi Day in a modern sense dates back to the event organized by physicist Larry Shaw at the Exploratorium museum in San Francisco in 1988. Shaw chose this day to draw attention to the first three digits of pi, which are 3.14, and organized various circle-themed activities at the museum to engage participants in fun pi-related activities. Pi Day is an event held on March 14th every year to celebrate the significance of the mathematical constant pi (π). Pi is an irrational number representing the ratio of a circle’s circumference to its diameter, known approximately as 3.14. Pi (the Greek letter π) is a symbol used in mathematics to represent a constant – the ratio of a circle’s circumference to its diameter – approximately 3.14159. Pi has been calculated to over a trillion digits past its decimal point. As an irrational and transcendental number, it will continue indefinitely without repeating or forming a pattern. While only a handful of digits are needed for typical calculations, Pi’s infinite nature makes memorizing it and calculating more and more digits a fun challenge.Pi Day has a history rooted in the event organized by physicist Larry Shaw at the Exploratorium museum in San Francisco in 1988. Over time, this celebration has gained popularity among the mathematics community and the general public, becoming a symbol of mathematical knowledge and creativity. In 2009, the United States House of Representatives officially recognized March 14th as National Pi Day, contributing to expanding the reach of this celebration. Thus, Pi Day has taken its place on the international stage as a day that both encourages mathematical curiosity and prompts reflection on the infinity and irrational nature of pi. On this special day, schools, universities, and math enthusiasts celebrate the beauty of pi and mathematics through various activities. These activities include pi-themed contests, calculations, memory games, and even food parties featuring the digits of pi. Pi Day aims to highlight the importance of mathematics in daily life while also increasing interest in science and creating a fun learning environment.