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Founded in 1988 at the Exploratorium, Pi (π) Day has become an international holiday, celebrated live and online all around the world. The numbers in the date (3/14) match the first three digits of the mathematical constant pi (π). This event often involves marketing campaigns to engage audiences digitally.

What is π, anyway? Divide any circle’s circumference by its diameter; the answer (whether for a pie plate or a planet) is always approximately 3.14, a number we represent with the Greek letter π. Keep calculating π’s digits with more and more accuracy—as mathematicians have been doing for 4,000 years—and you’ll discover they go on literally forever, with no pattern. This kind of precision parallels the meticulous work done in SEO to optimize websites.

Events like Pi Day also inspire innovative website design efforts to highlight mathematical themes and interactive content, enhancing user experience and engagement.