March 14 is the day math lovers (and most other people) celebrate pi, the measurement calculating the ratio of a circle's circumference to its diameter, the first three numbers of which are 3.14.

The number itself can go on forever. Google announced today one of its employees had calculated pi to a record 31.4 trillion digits.

» National Pi Day in Atlanta: Find out how to get free and cheap pie and pizza

» Pi Day: Woman spends months calculating 3.14 to 31.4 trillion digits for world record

Whether you love math or pie (yes, pizza pie counts), you’ll enjoy some of the best social media posts celebrating Pi Day 2019.

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Gang of Four members Hugo Burnham (from left), Jon King, Gail Greenwood and Ted Leo return to Atlanta for a farewell performance at Variety Playhouse on Tuesday, April 29. (Courtesy of Jason Grow)

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U.S. Sen. Jon Ossoff, D-Ga., speaks during a town hall on Friday, April 25, 2025, in Atlanta at the Cobb County Civic Center. (Jason Allen/Atlanta Journal-Constitution)

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