Prince Philip arrives in Toronto today to kick off what Ottawa calls a "private working visit."
The Duke of Edinburgh will be welcomed this afternoon by Governor General David Johnston.
On Saturday, Prince Philip will be at the provincial legislature to take part in a breakfast reception with Ontario Premier Kathleen Wynne and Lieutenant-Governor David Onley.
He will then present a new regimental colour to the Third Battalion of the Royal Canadian Regiment on the grounds of Queen's Park.
Regimental colours are a kind of ceremonial flag considered the most prized possession of every regiment.
The prince has served as the regiment's colonel-in-chief — an honorary title often bestowed on members of the Royal Family — since 1953.