Square Root Day Squared Category: Square Root Day Walt Boyes Submitted by nbartels on Tue, 03/03/2009 - 11:33 Update here. More on Square Root Day. (And, math majors, I'm sure the headline is technically inaccurate. But leave me alone. I'm an English major. You do the math.) Anyway, here, courtesy of AP, is the skinny on Square Root Day. Who knew?