The definition of a white Christmas in the UK is for a single snow flake (perhaps amongst a shower of mixed rain and snow) to be observed falling in the 24 hours of December 25th.
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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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Carols began as an old English custom called wassailing, toasting neighbours to a long life.
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Rudolph the red-nosed reindeer was invented for a US firm's Christmas promotion in 1938.
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Nearly 60 million Christmas trees are grown each year in Europe.
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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 first Christmas card was designed in 1843 by J.C. Horsley.
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