Square Root Day T-shirt, 4/4/16, Math Geek by Zany Brainy Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat Witty Tshirt for Square Root Day! Design shows a wheel with all the Square Root Days of the century, and the words "4/4/16 I WAS THERE". Math fans and historians alike will love this Square Root Day tee! Wear this math tshirt with pride to show you were there on this historic day! Share your Square Root Day celebrations on social media and flaunt this zainy geek t-shirt! The day coincides with Major League Baseball's Opening Day, so join in the festivities in this cool US holiday tee. This I was there tshirt is perfect for wearing whilst preparing your square vegetables, watching that yellow Squarepants guy or even hosting a square dance contest! Celebrate this unique and wacky tradition in style with this awesome and hilarious math nerd tee. Show your appreciation for all things numerical in this one-of-a-kind April 4th 2016 t-shirt. Check out our other zainy event tee designs for more awesome apparel! Lightweight, Classic fit, Double-needle sleeve and bottom hem