Workers' Memorial Day, also known as International Workers' Memorial Day or International Commemoration Day for Dead and Injured, takes place annually around the world on April 28, an international day of remembrance and action for workers killed, disabled, injured, or made unwell by their work. In Canada, it is commemorated as the National Day of Mourning. Although April 28 is used as the focal point for remembrance and a day of international solidarity, campaigning and other related activities continue throughout the year right around the world.