March 27 – The BBC broadcasts the entirety of Magyar Melody live from His Majesty's Theatre in London. The 175-minute broadcast is the first showing of a full-length musical by television.
Television demonstrations are held at the 1939 New York World's Fair on Long Island and the Golden Gate International Exhibition in San Francisco.
RCA, General Electric, Dumont and others begin selling television sets to the public in the New York City area. Screen sizes typically range from 5 to 12 inches, and Dumont features 14-inch and 16-inch models. Prices start at $200 and go as high as $1000.
Poland broadcasts a feature film for the first time—Barbara Radziwiłłówna (1936)—using the experimental transmitter mounted atop the Prudential building in Warsaw.
August 31 – 18,999 television sets have been sold in England before manufacture stops due to World War II.
September 1 – The anticipated outbreak of World War II brings television broadcasting at the BBC in Britain to an end at 12:35 p.m. after the broadcast of a Mickey Mouse cartoon, Mickey's Gala Premier, various sound and vision test signals, and announcements by presenter Fay Cavendish. It is feared that the VHF waves of television would act as a homing signal for guiding enemy bombers to central London: in any case, the engineers of the television service would be needed for the war effort, particularly for development of radar. The BBC would resume its broadcasting, with the same Mickey Mouse cartoon, after the war in 1946.