Labour Day in Canada is a statutory public holiday celebrated on the first Monday in September, coinciding with Labor Day in the United States. Its origins trace back to a pivotal April 15, 1872 labour demonstration in Toronto, where workers marched in support of striking printers, leading directly to the enactment of the Trade Unions Act which legalized unions. After a large 1882 Toronto celebration inspired American labour leader Peter J. McGuire to organize a similar parade in New York, the movement grew, and the holiday was officially recognized federally in 1894 when legislation introduced by Prime Minister John Sparrow David Thompson received royal assent. A notable tradition frowns upon wearing white after Labour Day, as it unofficially marks the end of summer. For sports fans, the weekend is highlighted by the Canadian Football League's "Labour Day Classic" rivalry games, while Atlantic Canada hosts the Wharf Rat Rally in Digby, Nova Scotia, and Toronto features the Canadian International Air Show. The city of Grand Falls-Windsor, Newfoundland, has an annual parade—its centennial in 2020 was replaced with an online ceremony due to the COVID-19 pandemic.