The twelve days of Christmas are the days between Christmas Day and Epiphany (6th of January) and represent the length of time it took for the wise men from the East to visit the manger of Jesus after his birth.
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The world's tallest Xmas tree at 221ft high was erected in a Washington shopping mall in 1950.
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The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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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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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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Black Friday in the UK is the Friday before Christmas. Instead of shopping, many people get very drunk!
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7.6 million Christmas trees are sold each year.
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