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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Many theologians estimate that Jesus wasn't born on December 25 but sometime in September between 6BC and 30AD.
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Electric lights for trees were first used in 1895.
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Coca Cola was the first beverage company to use Santa for a winter promotion.
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Robins on cards were a joke 150 years ago when postmen wore red tunics and were named after them.
20
The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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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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Gold-wrapped chocolate coins commemorate St Nicholas who gave bags of gold coins to the poor.
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