It’s Square Root Day! – March 03, 2009

If you’re tempted to suppress your inner geek, just remember that Square Root Day only happens nine times a century. The last one was Feb. 2, 2004, and the next one won’t be until April 4, 2016.

And it doesn’t matter which calendar convention you use.

Ultrageekily speaking, the last square (root) day was 12/12/144, but I guess we’re suppressing the leading digits here.