- Dec 1 Grey Cup, Varsity Stadium, Toronto: Queen's University retains title with 54-0 win over Regina Rugby Club; biggest Grey Cup victory margin ever
- Dec 3 First Congressional open session broadcast via radio (Washington, D.C.)
- Dec 4 WEAF radio begins broadcasting Eveready Hour (variety show)
Radio Premiere
Dec 6 1st US Presidential address broadcast on radio by President Calvin Coolidge
- Dec 8 German-US friendship treaty signed
- Dec 8 Labour/Liberals win British parliament
- Dec 8 Salary & price freeze in Germany
- Dec 10 Polish government of Grabski forms
- Dec 16 National Football League Championship: undefeated Canton Bulldogs (11-0-1) repeat as champions
- Dec 17 Greek king George II overthrown by army/republic
- Dec 18 International zone of Tangier set up in Morocco
- Dec 21 Nepal changes from British protectorate to independent nation
- Dec 22 Bill Ponsford & Edgar Mayne make 456 opening stand for Vict
- Dec 23 Yankees pitcher Carl Mays sold to Reds for $85,000
- Dec 25 Imperial Theater opens at 249 W 45th St NYC
Theater Premiere
Dec 28 George Bernard Shaw's play "Saint Joan" premieres at Garrick Theatre in NYC
