- Dec 2 1st Model A Ford sold, for $385
Event of Interest
Dec 2 Paleoanthropologist Davidson Black announces to the Geological Society of China that the ancient human fossils from Zhoukoudian, China are a new species which he has named 'Sinanthropus pekinensis' (now known as 'Homo erectus')

Davidson Black
Music Premiere
Dec 4 Dmitri Shostakovich's 2nd Symphony premieres in Moscow

Dmitri Shostakovich
Event of Interest
Dec 4 Duke Ellington opens at the Cotton Club in Harlem

Duke Ellington
- Dec 4 Pittsburgh Pirates future Baseball Hall of Fame outfielder Paul Waner wins NL MVP
- Dec 10 "Grand Ole Opry" first named as such during Barn Dance radio broadcast, in Nashville, Tennessee
- Dec 14 Iraq gains independence from Britain, but British troops remain
- Dec 15 William Edward Hickman kidnaps 12 year-old Marion Parker in Los Angeles, whom he later kills
Event of Interest
Dec 16 Australian cricket's batting maestro Don Bradman makes his 1st-class debut for NSW v South Australia at the Adelaide Oval finishing Day 1 on 65 not out

Donald Bradman
- Dec 17 Australian cricketing prodigy Don Bradman scores 118 in his 1st-class debut for NSW against South Australia at the Adelaide Oval
- Dec 17 US submarine S-4 sinks after collision killing all 34 aboard
- Dec 17 Victoria score 793 against Queensland, Bill Ponsford 437
- Dec 19 National Football League Championship: New York Giants (11-1-1) win first past the post title
- Dec 24 Test Cricket debut of Walter Hammond, who scored 51 & took 5-36 v S Af
Event of Interest
Dec 27 Jerome Kern and Oscar Hammerstein II's "Show Boat" premieres in New York City

Jerome Kern
- Dec 27 Philip Barry's "Paris Bound" premieres in NYC