Commonwealth Day Canada is celebrated on the second Monday of March, aiming to renew international cooperation and solidarity among the nations of former British colonies, which number over two billion people. Initially observed as Empire Day, the day was renamed Commonwealth Day in 1958. Canada, a constitutional monarchy, celebrates this occasion with enthusiasm, including the hoisting of the Royal Union Flag at federal establishments. Families gather to hear messages of unity and intercontinental solidarity from the Queen. The observance has evolved to emphasize reconciliation rather than celebration, reflecting a shift in perspective regarding the legacy of colonization.