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Pi Day, celebrated on March 14 (3/14), honors the mathematical constant Pi, which represents the ratio of a circle's circumference to its diameter.
Originating in 1988 at the Exploratorium science museum in San Francisco, Pi Day has gained national recognition and is now designated by Congress annually.
Pi has practical applications in various fields, from physics to engineering, and its infinite and irrational nature has fascinated mathematicians for centuries.
Celebrations include events at museums, college campuses, and businesses, with activities like mental math games and, of course, enjoying pies.
NASA also joins the festivities with online challenges related to space exploration and mathematics.
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