Mariah Carey’s single “All I Want for Christmas Is You” reached number one, 25 years after its release.
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The mayor of Flint, Michigan, declared a state of emergency over contaminated water.
The name 'Euro' was officially adopted for European Currency.
A five-day pollution red alert was declared in Beijing and 21 other Chinese cities.
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.
