A Mongol horde led by Batu Khan conquered and sacked the Russian city of Ryazan.
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The first manned Moon voyage, the Apollo 8, launched with Frank Borman, Jim Lovell, and William Anders.
The first feature-length silent film comedy, 'Tillie's Punctured Romance,' was released, starring Marie Dressler, Mabel Normand, and Charlie Chaplin.
Antonov An-255 Mriya, the largest airplane in the world, flew for the first time.
Psy's music video for 'Gangnam Style' surpassed one billion views on YouTube, becoming the first video to do so in the website's history.
Elton John and his partner David Furnish registered their civil partnership at Windsor Town Hall on the first day civil partnerships could legally be performed in England.
