And thanks to Shelley for tipping me off.
March 3, 2009 --> 3.3=09. Get it?
So the next easy one won't be until April 4, 2016. Have to get that on the calendar. Thinking about ways to celebrate. Root vegetables on our square plates come to mind but I'm not sure that will work in the "celebration" category for my kids. Maybe we'll plant an avocado seed and the amaryllis that's still hanging out from post-holiday sales. Or carrot cake in a square pan?
But if anyone has another idea of how to teach preschoolers about square roots, I'm all ears!