May 20th, 1939 (SATURDAY)
UNITED KINGDOM: Submarine HMS Taku launched.
FRANCE: Destroyer FS Lansequenet launched.
U.S.S.R.: Moscow: Commissar for Foreign Affairs Molotov meets with the German ambassador Schulenburg. More...
U.S.A.: The first North Atlantic Air Mail service is launched by Pan American Airways from New York to Marseilles, France via the Azores.