German armies took Allied forces by surprise in the Ardennes, marking the beginning of the Battle of the Bulge.
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'Jingle Bells' became the first song played in space when it was broadcast during NASA's Gemini 6 space flight.
Mariah Carey's single 'All I Want for Christmas Is You' reached number one, 25 years after its release.
'Lawrence of Arabia' film directed by David Lean, was released in the United States.
The Anglo-Irish Treaty, agreed to by the British Parliament and Sinn Féin, was ratified.
The US State Department increased the reward for information on the Islamic State leader Abu Bakr al-Baghdadi to $25 million.
