The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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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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English Puritan leader Oliver Cromwell banned Christmas between 1647 and 1660 because he believed such celebrations were immoral for the holiest day of the year.
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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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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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Electric lights for trees were first used in 1895.
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