National Jersey Day Show your support for School Sport across Canada! "Wear Your Jersey to School / Work" NBIAA and School Sport Canada are supporting Thursday, November 14th as a national day to show your love and support for sport by wearing a sport jersey to school, work or play. From municipal council chambers to office buildings and classrooms across the nation, we envision a sea of Canadians wearing their hearts on their sleeves on national Jersey Day. Join the high school sport associations across Canada to show your support for sport and to spread the word in your school!