Many theologians estimate that Jesus wasn't born on December 25 but sometime in September between 6BC and 30AD.
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Nearly 60 million Christmas trees are grown each year in Europe.
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Rudolph the red-nosed reindeer was invented for a US firm's Christmas promotion in 1938.
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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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The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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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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Frumenty was a spiced porridge, enjoyed by both rich and poor. It was a forerunner of modern Christmas puddings. It is linked in legend to the Celtic god Dagda, who stirred a porridge made up of all the good things of the earth.
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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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