Pi Day is celebrated every year on March 14th (3/14) to honor the mathematical constant π (pi), which represents the ratio of a circle’s circumference to its diameter—approximately 3.14159. The date aligns with the first three digits of pi, making it a playful occasion for math enthusiasts to recite digits, explore the beauty of mathematics, and, fittingly, enjoy a slice of pie. Beyond the fun, Pi Day highlights the wonder of infinite numbers and the role math plays in everyday life.