The union issued a statement at midnight saying that after a year of bargaining with little progress, postal workers made the difficult decision to strike, Xinhua news agency reported.

Canada Post had the opportunity to prevent this strike, but it has refused to negotiate real solutions to the issues postal workers face every day, said the CUPW.

"A strike is a last resort," the CUPW said.

The demands listed by the CUPW are fair wages, safe working conditions, the right to retire with dignity, and the expansion of services at the public post office.

Negotiated collective agreements could be achieved but Canada Post must be willing to resolve the new and outstanding issues, the CUPW added.