<p>A Salvation Army worker makes donuts and pies for World War I troops in France in a photo from a 1920 issue of <i>National Geographic</i>.</p>

Supporting the Troops

A Salvation Army worker makes donuts and pies for World War I troops in France in a photo from a 1920 issue of National Geographic.

Photograph by Col. E. J. Parker

9 Mouthwatering Pictures of Pie for Pi Day

Celebrate the quirky holiday by enjoying these photos from our archives.

March 14 is Pi Day, because the date (3/14) contains the first three digits of the number pi, or 𝛑, the ratio of a circle’s circumference to its diameter.

But if we’re being honest, most people don’t get excited about Pi Day because they loooove geometry—they celebrate the holiday because it is a great excuse to eat pie. It’s also a great excuse to enjoy these historic photos of people making, serving, or eating pie.

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