The 50th birthday of Adolf Hitler on 20 April 1939 was celebrated as a national holiday throughout Nazi Germany and some other parts of the world. Minister of Propaganda Joseph Goebbels made sure the events organised in Berlin were a lavish spectacle focusing on Hitler. The festivities included a vast military parade with some 40,000 to 50,000 German troops taking part, along with 162 Luftwaffe airplanes flying overhead. The parade was intended in part as a warning to the Western powers of Nazi Germany's military capabilities. The parade lasted for more than four hours, with 20,000 official guests, along with several hundred thousand spectators being present.