The last walkout of this magnitude in Canada was in 1991. Nearly one-third of federal public servants will be on strike, according to PSAC.

The union is calling for a wage increase of 13.5% over three years. But the government is proposing only 9% over 3 years, PSAC says. Many public services will be affected, including taxes, passport applications and immigration applications, the union says. The strike begins at midnight (04:00 GMT) on Wednesday, April 19.