 It was premiered in Boston, Massachusetts on 12 October 1945 by the dedicatees .The second movement is dated 26 May 1944, and so it is very probable that he was working on the finale when news was received of the Allied landing in Normandy on 6 June.Although this has sometimes been interpreted as an influence on the joyful turn taken in this movement, it is also possible that the overall design of the symphony had been established much earlier .