https://tc.canada.ca/en/aviation/licens ... ient-pilot
The link takes you to the TC page of ALL the requirements. 6 mo, 2 year and 5 year. Please read.
A safety course is NOT a sole requirement, but one of a number of choices. I do the annual test in the aviation safety newsletter and peruse the AIM and so on while checking answers I got wrong. So I'm always within 1 year of the 2 year cycle. IN addition, safety courses and others listed on the TC web page are a good idea. We also have informal meetings after flying or around the bonfire, so staying for that is very helpful as well.