Jour des Franco-Ontariens, or Franco-Ontario Day, is celebrated annually on September 25th to honor the Franco-Ontarian community, its rich history, language, and contributions to the province of Ontario. The date marks the anniversary of the first raising of the Franco-Ontarian flag at the University of Sudbury in 1975. The day serves as an official recognition by the Ontario government of the community's significant social, economic, and cultural impact on the province.