Hiroshima and Nagasaki By ffghh Jul 16, 1945 Trinity test and sending of the bombs "Little Boy" et "Fat Man" à San Francisco Jul 21, 1945 President Harry S Truman approves the dropping of bombs on Japan Jul 26, 1945 the arrival of the bombs in san francisco Jul 29, 1945 arrivals of the last components for the bombs Aug 3, 1945 date from which bombs were authorised to be dropped, given by an order on 24 July Aug 6, 1945 bombing of Nagasaki Aug 9, 1945 bombing of Hiroshima Aug 15, 1945 Japan announces its surrender Sep 2, 1945 the Empire of Japan sign the Acts of Surrender in Tokyo Bay