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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Christmas trees become popular in the UK from 1841 when Prince Albert erected a tree in Windsor Castle following a German tradition. Fir trees have been decorated at Christmas time in Germany since the 8th century.
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The abbreviation Xmas isn't irreligious. The letter X is a Greek abbreviation for Christ.
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Although now mostly vegetarian, in Victorian times, mince pies were made with beef and spices.
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In 1999, residents of the state of Maine in America built the world's biggest ever snowman. He stood at 113ft tall.
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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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