You’ll see that the crust spans a little more than 3 pies. That’s Pi ≈ 3.14 ... Since then, the holiday has become a staple day for online memes, polite chuckle jokes and wretched puns.

The observance originated in the late 1980s in California, where physicists first served circular fruit pies to the public on the 14th day of the third month, or, 3/14 (the first three significant ...