 In 1989, the AFL-CIO declared April 28 "Workers' Memorial Day" to honor the hundreds of thousands of working people killed and injured on the job every year.April 28 is the anniversary of the date the Occupational Safety and Health Act of 1970 went into effect, and when the Occupational Safety and Health Administration was formed (April 28, 1971).Previously, in 1984, the Canadian Union of Public Employees (CUPE) established a day of mourning.