Robins on cards were a joke 150 years ago when postmen wore red tunics and were named after them.
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The Queen's Christmas speech was first televised in 1957.
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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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'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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One town in Indiana is called Santa Claus. There is also a Santa, Idaho.
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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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The poinsettia is a traditional Christmas flower. In Mexico (its original birthplace), the poinsettia is known as the "Flower of the Holy Night".
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Carols began as an old English custom called wassailing, toasting neighbours to a long life.
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