The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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The abbreviation Xmas isn't irreligious. The letter X is a Greek abbreviation for Christ.
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Gold-wrapped chocolate coins commemorate St Nicholas who gave bags of gold coins to the poor.
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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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'Klaxon' is a name that does not belong to one of Santa's reindeer. A klaxon is actually a powerful electric horn. Its name comes from a German word meaning "shriek".
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7.6 million Christmas trees are sold each year.
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There are 13 Santas in Iceland, each leaving a gift for children. They come down from the mountain one by one, starting on December 12 and have names like Spoon Licker, Door Sniffer and Meat Hook.
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Nearly 60 million Christmas trees are grown each year in Europe.
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