Most visitors are allowed to stay for up to six months. Students and temporary workers have permission to stay for the duration of their studies or employment contract. Be sure to check the validity date of your stay on your documents. The entry stamp in your passport shows the date you entered Canada.
If you wish to stay beyond the authorized date, you must apply for an extension before the expiry of your visitor status. If you want to change the terms and conditions of your stay, you must also submit an application.