Toronto hosted the 1872 workers’ demonstration that helped lead to trade-union legalization in Canada.
The demonstration took place on April 15, 1872, after Toronto printers organized a strike seeking a nine-hour workday. Thousands of workers and supporters marched through the city. At the time, Canadian law could treat labor organizing and collective action as conspiracies or criminal combinations.
The public demonstration contributed to political pressure for the Trade Unions Act, passed by the Parliament of Canada in June 1872. That law removed the criminal-conspiracy threat from trade-union activity, although workers still faced serious legal and economic limits in organizing.
The Toronto event became an important part of Canada’s labor history and is frequently connected with the development of Labour Day. It is distinct from the first U.S. Labor Day celebration, which occurred in New York City later in 1882.