Today, March 14, is Albert Einstein’s birthday. It’s also Pi Day (3/14) for those who use the month/day/year date format. If you’re into greater precision, celebrate Pi Minute (3/14, 1:59) or even Pi Second (3/14, 1:59:26).

Europeans and others who use the more logical day/month/year date format prefer to celebrate Pi Approximation Day on July 22 (22/7).

Technically, of course, all of these, including Pi Second, are Pi Approximations.

In any case, enjoy some pi(e) today! Or convert some matter into energy!