In short, no. An employer cannot force an employee to work overtime if the hours are outside of what are considered regular hours.
However, there are special circumstances. If your employment agreement includes provisions for working additional hours beyond your regular workday, the company is required to pay you overtime at a rate of time and a half. Additionally, if you have previously agreed to work overtime on certain occasions, this may be considered accepting overtime within your role.
If you have questions regarding overtime requirements, contact employment lawyers, Sultan Lawyers, online or by telephone at 416-214-5111.