Rudolph the red-nosed reindeer was invented for a US firm's Christmas promotion in 1938.
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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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Many theologians estimate that Jesus wasn't born on December 25 but sometime in September between 6BC and 30AD.
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Carols began as an old English custom called wassailing, toasting neighbours to a long life.
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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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Robins on cards were a joke 150 years ago when postmen wore red tunics and were named after them.
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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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The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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