Make sure to arrive at around 9:30am to get a good spot to watch the show. Note that while it does formally begin at 10:00am, you want to be here a bit early to find a good spot to watch. In my opinion, pick the area near the road on the south side. You will notice an path that allows people to go into the green field, that is where you want to be, just make sure not to be in the path since that is where the people come in.
The Changing of the Guard has ceremonial guards along with a marching band and pipers performing the ceremony which provides for a good show. The guards are from two regiments, the Governor General's Footguards and the Canadian Grenadier Guards. I did feel bad for them since they are fully clothed during the hot summer weather.
The event itself lasts roughly 30 minutes, during this there is someone over the speaker explaining the history and what is happening in both English and French. It is a free event, so there is a good amount of people here to watch. It is a nice way to start the morning.
Come back next Friday for another Past Point of Interest!