Federal Canada unjust dismissal: what is the deadline?

For federally regulated employees, the Labour Program says an unjust dismissal complaint must generally be filed within 90 days of dismissal. Eligibility normally requires at least 12 consecutive months with the same employer, no collective agreement coverage, and not being a manager. Official source: Government of Canada Labour Program. Guide: https://getinstantlaw.com/employment-workplace-problems/fired-from-job