Elementary and middle schools are filled with "holidays" you don't actually get to celebrate in the real world -- Cinco de Mayo, anyone? -- but chief among them, obviously, is Pi Day. Only celebrated in fifth- through tenth-grade math classrooms, Pi Day, for the uninitiated, is celebrated on March 14th and honors pi, the mathematical constant found in the ratio between a circle's radius and diameter --- 3.14. Pi Day in middle school meant fun math songs (although my fifth-grade teacher never let us sing that one), math games, and, of course, pie.
While it's unlikely that you'll celebrate with a slice of apple or cherry today -- though your coworkers wouldn't mind that gift -- here are some fun pi facts in honor of Pi Day: