In 1984, the Canadian Labour Congress established April 28th as the National Day of Mourning in Canada to remember and honour those who have died, been injured or suffered illness in the workplace.
The date was chosen in 1984, when the Canadian Labour Congress proclaimed the Day to coincide with the 70th anniversary of the day the first Ontario Worker's Compensation Act was approved by the government (1914). The Day of Mourning was enshrined in national legislation by an Act of Parliament on February 1, 1991.
The Day of Mourning, also known as Workers' Memorial Day, is officially recognized in about 100 countries worldwide.