Background: Rosenberg was born on 12 January 1893 in Tallinn in the Russian Empire, the capital of modern Estonia, to a family of Baltic Germans. His father, Waldemar Wilhelm Rosenberg, was a wealthy merchant from Latvia, and his mother, Elfriede (nee Sire), was a teacher of French language in Tallinn. The Hungarian-Jewish journalist Franz Szell, who was apparently residing in Tilsit, Lithuania, spent a year researching in Latvian and Estonian archives before publishing in 1936 an open letter, with copies to Hermann Goring, Joseph Goebbels, German foreign minister Konstantin von Neurath, and others, accusing Rosenberg of having "no drop of German blood" flowing in his veins. Szell wrote that among Rosenberg's ancestors were only "Latvians, Jews, Mongols, and French."
Context: Rosenberg was captured by Allied troops at the end of the war in Flensburg-Murwik. He was tried at Nuremberg and found guilty of all four counts: conspiracy to commit crimes against peace; planning, initiating and waging wars of aggression; war crimes; and crimes against humanity. The final judgment against him named him one of the principal planners of the invasions of Norway and the Soviet Union. It also held him directly responsible for the systematic plunder of the occupied countries of Europe, as well as the brutal conditions in Eastern Europe. During his trial he wrote his memoirs, which were published posthumously and with analytical commentary by Serge Lang and Ernst von Schenck.  He was sentenced to death and executed with other condemned co-defendants at Nuremberg Prison on the morning of 16 October 1946. His body, like those of the other nine executed men and that of Hermann Goring, was cremated at Ostfriedhof (Munich) and the ashes were scattered in the river Isar.  Throughout the trial, it was agreed that Rosenberg had a decisive role in shaping Nazi philosophy and ideology. Examples include: his book, Myth of the Twentieth Century, which was published in 1930, where he incited hatred against "Liberal Imperialism" and "Bolshevik Marxism"; furthering the influence of the "Lebensraum" idea in Germany during the war; facilitating the persecution of Christian churches and the Jews in particular; and opposition to the Versailles Treaty.  According to Joseph Kingsbury-Smith, who covered the executions for the International News Service, Rosenberg was the only condemned man who, when asked at the gallows if he had any last statement to make, replied with only one word: "No".
Question: When was he executed?

Answer:
on the morning of 16 October 1946.