1940 in jazz

	… 1930; 1931; 1932; 1933; 1934; 1935; 1936; ; 1937; 1938; 1939; 1940; 1941; 1942; 1943; ; 1944; 1945; 1946; 1947; 1948; 1949; 1950 …;
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This is a timeline documenting events of Jazz in the year 1940.