Pulaski Squared

For you non-Chicagoans (and non-Polish people), yesterday was Casimir Pulaski Day. What, you might ask, is Casimir Pulaski Day?

I have two answers for you. It is:

1. A song by Sufjan Stevens from the album Illinois.
2. A holiday celebrating Casimir Pulaski, a Polish immigrant who helped the Americans defeat the British during the Revolutionary War.

Chicago has the largest Polish population outside of Poland, so public schools were off yesterday. Hurray, Poland!

ALSO, today is Square Root Day! Hurray, math nerds!