Pi Day » The official web site for Pi Day, March 14th Posted by Chris Atkinson on March 11, 2009 in Math Pi Day is coming! Check out these ideas… Pi Day » The official web site for Pi Day, March 14th tags: pi, math, mathematics, PiDay, events, 14th, fun, geek Pi Day » Classroom Activities tags: classroom, pi Pi Day » US Congress Resolution for a National Pi Day tags: pi Posted from Diigo. The rest of my favorite links are here. Math