National Day of Mourning in Canada
National Day of Mourning in Canada is held on April 28. Every year on April 28 we pay our respects to, and remember, the thousands of workers who have been killed, injured or suffered illness as a result of work-related incidents. This event in the third decade of the month April is annual. 
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The date 28 April was picked because on that day in 1914, the Workers Compensation Act received its third reading. On April 28, 1985, the Canadian Labour Congress officially declared it an annual day of national remembrance. In December 1990, the Workers Mourning Day Act passed in Parliament, making April 28 as the annual Canadian National Day of Mourning.
Similar holidays and events, festivals and interesting facts
International Sculpture Day on April 26 (Held on the last Saturday of April);
Asian Heritage Month on May 1 (Canada);
Vision Health Month in Canada on May 1 (also Ankylosing Spondylitis; Awareness Month; Bladder Cancer Awareness Month; Brain Tumour Awareness Month; Celiac Awareness Month; Hemochromatosis Awareness Month; Hypertension Awareness Month; National Physiotherapy Month);
No Pants Day on May 2 (It is held on the first Friday in May);
Mental Health Week in Canada on May 5 (Held in the first full week of May);
National Nursing Week in Canada on May 5 (Held from Monday to Sunday of the same week in which the date May 12 is located);
Sun Awareness Week in Canada on May 5 (Held from the first Monday in May)