The month of March has a lot to offer: Daylight saving time; basketball madness; St. Patrick’s Day; the first day of spring; and today, March 14. It’s National Pi Day! 3.14 — get it? Pi: 3.14; a mathematical constant defined as the ratio of a circle’s circumference to its diameter. My sincere thanks to Google for that definition because I wouldn’t have come up with it on my own.