US scientists calculated that Santa would have to visit 822 homes a second to deliver all the world's presents on Christmas Eve, travelling at 650 miles a second.
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Robins on cards were a joke 150 years ago when postmen wore red tunics and were named after them.
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Christmas trees become popular in the UK from 1841 when Prince Albert erected a tree in Windsor Castle following a German tradition. Fir trees have been decorated at Christmas time in Germany since the 8th century.
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Electric lights for trees were first used in 1895.
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The tradition of putting tangerines in stockings comes from 12th-century French nuns who left socks full of fruit, nuts and tangerines at the houses of the poor.
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The Queen's Christmas speech was first televised in 1957.
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The abbreviation Xmas isn't irreligious. The letter X is a Greek abbreviation for Christ.
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