1921 in radio

Events

• 3 January – Station 9XM, at the University of Wisconsin, Madison, transmits the first spoken weather forecast. The station had been broadcasting weather bulletins in Morse code since 1916.
• 4 March – Text of the speech, given at the U.S. Presidential inauguration in Washington, D.C. by Warren G. Harding, is read over KDKA in Pittsburgh, Pennsylvania.
• 5 August – First broadcast of a Major League baseball game is aired by KDKA, as the Pittsburgh Pirates defeat the Philadelphia Phillies 8–5 at Forbes Field.
• 19 September – First commercially licensed radio broadcasting station in the United States, WBZ, is launched by the Westinghouse Electric Corporation in Springfield, Massachusetts. It is the first broadcasting station to receive a license that explicitly specified operation on the 360 meter wavelength formally assigned to the broadcasting service by regulations which became effective 1 December 1921.
• 20 September – KDKA and the Pittsburgh Post create the first "news room" and "news department".
• 25 September – The wireless telegraph station in Sofia makes the first public radio broadcast in Bulgaria: the retransmission of a concert from the German station at Nauen.
• 8 October – First broadcast of American football is on the air via KDKA as the University of Pittsburgh defeats West Virginia University at Pittsburgh's Forbes Field.
• 17 November – First radio broadcast in New Zealand is made by University of Otago physics professor Robert Jack.
• 26 November – First public radio broadcast in France, from the Compagnie générale de la télégraphie sans fil Sainte-Assise transmitter.
• 27 November – U.S. bandleader Vincent Lopez and his group begin making a series of weekly 90-minute music broadcasts on Westinghouse-owned station WJZ in Newark, New Jersey.
• 1 December – Effective date, in the U.S., for the first formal establishment of a broadcasting station service. and/or 485
• 24 December – First public radio broadcast from the Eiffel Tower in Paris.

Births

• 25 February – Patricia Ryan, English-born American child actress, continues performing on radio until her death
• 5 March – Charlez ar Gall, Breton-language broadcaster
• 21 March – Antony Hopkins, British composer, pianist, conductor and music broadcaster
• 1 April – Steve Race, English pianist-composer and radio presenter
• 23 May – Humphrey Lyttelton, English jazz trumpeter and radio presenter
• 19 July – Harold Camping, American religious broadcaster
• 21 September – Jimmy Young, English singer and broadcaster
• 19 October – Bern Bennett, American radio and television announcer
• 24 December – Jimmy Clitheroe, English comic entertainer