Did you eat your cubic radishes today? Tuesday's date, 3/3/09, defines it as Square Root Day - one of 9 such dates every century (or 12 such dates this millenium, depending on how you define it. If you still know where your slide rule is (which I do) I'm sure you celebrated it quite heartily.
And if you also scored well on the verbal, you'll be equally interested in National Grammar Day, which I will observe by carrying a red pen visibly in my shirt pocket all day. Actually, I do that every work day.