Workers’ Memorial Day, also known as the National Day of Mourning, is observed in Canada and Gibraltar every April 28. This day commemorates workers who have died, sustained injuries, or suffered illnesses due to workplace-related incidents and hazards. The inaugural observance took place in Great Sudbury, Ontario, in 1984, coinciding with the 70th anniversary of the Workers’ Compensation Act, which recognized the inevitability of workplace injuries and the need for compensation. Officially declared an annual day of remembrance by the Canadian Labour Congress, it was later recognized by the Canadian parliament in 1990. On this day, the Canadian flag is flown at half-mast on federal government buildings, and a moment of silence is observed at 11 a.m. Workers often wear black armbands and ribbons, light candles, and hold memorial services to honor their deceased or injured colleagues. Additionally, the day is recognized internationally by the International Labor Organization as part of the World Day of Safety and Health at Work.