The History behind April 28th, Canada’s National Day of Mourning

One of the original April 28th National Day of Mourning posters showing a canary singing in a cage, reminding us of the canaries used in the past in coal mines to detect hazardous gases.
National Day of Mourning Poster

This post was written by Dorothy Wigmore, Occupational health and green chemistry specialist, from Winnipeg, Manitoba, and a member of the American Public Health Association (APHA)The article was originally published in the Spring 2010 Occupational Health and Safety Section Newsletter [1], and subsequently posted on the APHA website.

This article was previously incorrectly attributed. Our sincere apologies to Ms. Wigmore for this error. Our deep appreciation goes to her for permission to reprint this article. Contact the author.

April 28 has many names. In Canada, it’s the Day of Mourning. In the United States and the United Kingdom, it’s Workers’ Memorial Day. The International Labour Organization calls it the World Day for Safety and Health at Work. Marked around the world, there’s confusion about its origins, even in Canada.

Around 1983, the health and safety director of the Canadian Union of Public Employees (CUPE), Colin Lambert, and his long-time friend and fellow activist, Ray Sentes, came up with the idea of a day to recognize workers killed and injured on the job.

As a steelworker and miner in Sudbury, Ontario, Lambert was instrumental in having mandatory coroners’ inquests for all miners’ deaths in Ontario. He also lamented the contrast between the lack of recognition for miners and other workers who died because of their work and the large public events for “fallen” police officers and firefighters.

Lambert “floated the idea” with CUPE’s national health and safety committee, talking about a special day of recognition for workers killed and injured on the job, to be held on May 1 (celebrated as May Day in Europe and elsewhere). The committee endorsed the idea. At its 1984 convention, union delegates supported the proposal. Soon after, some CUPE locals started negotiating events, such as lowered flags and moments of silence.

In 1984 and 1985, CUPE representatives took the idea to the Canadian Labour Congress (CLC) executive and its national health and safety committee. Local unions also sent resolutions to the CLC.

In February 1986, the CLC announced the first Day of Mourning, coinciding with the first day of its convention that year. Rather than May 1, they chose the date when the Ontario legislature passed the country’s first workers compensation law, in 1914. The convention passed a resolution supporting April 28 as a day to “mourn for the dead and fight for the living.”

In 1990, Lambert and CUPE pushed for innovative ways to recognise the day. April 28 could be a “year-round series of public events”, not just a Day of Mourning. We can attract “broad public recognition for the day by adopting a universal, unthreatening symbol of worker safety, the canary.”

“The canary’s an appropriate symbol,” Lambert said. “It shows that today workers are the canaries — they are front-line protection for all of us.” The canary also showed up in the CLC’s new poster for April 28.

Lambert and others saw the potential for a day of “preventive action for workers which will be recognized by society in general.” They called on CUPE locals to have activities in the week heading up to the 28th. They sent a package with a new poster — introducing the canary symbol — and a special issue of the health and safety newsletter. There also was a workplace inspection checklist and calls for locals to campaign for government recognition of the day, and to bargain or ask employers for a moment’s silence at 11 a.m. on April 28.

CUPE members and others responded with enthusiasm. The British Columbia CUPE health and safety committee had a “Spot the Hazard” campaign for workplace inspections. In Winnipeg, Manitoba, the Federation of Labour and CUPE produced tags with the canary symbol and “Day of Mourning, April 28”. They sold them with members of the local professional football team and the Boys and Girls Club, with proceeds to the Club. In Windsor, Ontario, more than 300 people marched to the Ministry of Labour to lay a wreath and release black balloons inscribed with “We came here to work, not to die”.

The campaign for government recognition paid off. In February 1991, the Canadian government passed a private member’s bill, naming April 28 as the “Day of Mourning for Persons Killed or Injured in the Workplace.” Provincial and municipal governments also recognize the day.

These efforts and many others inspired trade unions and health and safety activists and around the world. Monuments and plaques are some of the most common responses. There were so many by 2001 that Ed Thomas of Hamilton wrote a book about them [2]. The Canadian Centre for Occupational Health and Safety (CCOHS) put some of his pictures on a web page [3].

The campaign for recognition of the day has been successful. Now, what about the goals behind it?


[1]     D. Wigmore. “The History Behind April 28th”.  Occupational Health and Safety Section Newsletter, Spring 2010. American Public Health Association (APHA).

[2]     E. Thomas, Dead But Not Forgotten: Monuments to Workers. Ed Thomas, 2001.

[3], “National Day of Mourning – April 28“, 2015. [Online]. Available: [Accessed: 05- Jan- 2016].

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Acknowledgements: D. Wigmore, APHA, 2010.
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National Day of Mourning

Today is the 28th of April, the National Day of Mourning for Workers Killed at Work.

Each year in Canada workers, employers and citizens gather to pay their respects to people killed at work. This is as important a day in my mind as November 11. Why?

  • I believe that everyone who wants to contribute to society should be able to work and be paid a fair wage for their efforts.
  • I believe that everyone who goes to work is entitled to a safe workplace.
  • I believe that everyone who goes to work is entitled to go home to their lives, their loved ones, their hopes and dreams every day.
  • I believe that a safe workplace is a productive workplace.
  • I believe that engineers, technologists, technicians, tradespersons and others that design, build, maintain and modify machinery have an ethical and moral obligation to ensure the ongoing safety of those that use the products that result from their work.

Every year in Canada hundreds of people die at work. As you can see, despite increasing efforts to regulate safety in the workplace, the annual toll as shown by the red trend line continues to rise.

Total Canadian Workplace Fatalities 1993-2010
Total Canadian Workplace Fatalities 1993-2010

These figures come from the National Work Injury Statistics Program (NWISP), and the source chart can be found here.

What can we do to reverse this trend? I think we need to “be the change we want to see in the world’, making certain that we take the time to understand the regulations and standards that apply to our designs, that we implement the best technological solutions in those designs, and that we ensure that we do not endanger others by rendering those safety systems ineffective.

Today, take a moment to pause at 11:00 and be silent. Light a candle or hold a vigil. You won’t be alone. Then, work for change.

These are just some of the reasons why this day is so important to me. What about you? Do you know someone whose life ended at work? Do you know a family that has been affected by a workplace injury or fatality? Please share your thoughts and stories in the comments!

Want to know more about the Canadian National Day of Mourning? See this page and this page.