Description Happy Pi Day - March 14th design. The design for the Pi Day on March 14th says Happy Pi Day and shows a pie with the Pi symbol. Ligero, Encaje clasico, Manga de doble puntada y bastilla baja Amazon Prices 18.13 18.13 1 18.13 14.68 3.45 Consult Consult Share Product Image Categories Ropa Brand: March 14th - Happy Pi Day