It was Athlone's duty to play host at Quebec City to his prime minister, still Mackenzie King, as well as Churchill and United States president Franklin D. Roosevelt, who all gathered to take part in what would become known as the Quebec Conferences, with the first taking place between 17 and 24 August 1943 at the viceregal residence in La Citadelle, and the second occurring from 12 to 16 September 1944 at the Château Frontenac. It was at these meetings that the four men discussed the Allied strategies that would eventually lead to victory over Nazi Germany and Japan. When Germany fell on 8 May 1945 and Japan on 15 August of the same year, Athlone led the national celebrations held on Parliament Hill and elsewhere. He thereafter spoke in speeches about Canada's future being marked not by war but by a strong role in reconstruction and reconciliation.