It’s only been a couple of weeks since 1234567890 Day, and we already have another “math holiday” upon us. Today is Square Root Day (3/3/09). It only comes around nine times per decade century with the next being April 4, 2016 (4/4/16). Admittedly, this one is kind of weak, but thought I’d share. The math holiday I’m really looking forward to is November 23, 2058 (11/23/58).