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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Carols began as an old English custom called wassailing, toasting neighbours to a long life.
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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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The abbreviation Xmas isn't irreligious. The letter X is a Greek abbreviation for Christ.
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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 poinsettia is a traditional Christmas flower. In Mexico (its original birthplace), the poinsettia is known as the "Flower of the Holy Night".
15
7.6 million Christmas trees are sold each year.
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Coca Cola was the first beverage company to use Santa for a winter promotion.
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