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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Robins on cards were a joke 150 years ago when postmen wore red tunics and were named after them.
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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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The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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'Klaxon' is a name that does not belong to one of Santa's reindeer. A klaxon is actually a powerful electric horn. Its name comes from a German word meaning "shriek".
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Electric lights for trees were first used in 1895.
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