The first Christmas card was designed in 1843 by J.C. Horsley.
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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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Robins on cards were a joke 150 years ago when postmen wore red tunics and were named after them.
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Although now mostly vegetarian, in Victorian times, mince pies were made with beef and spices.
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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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In Greek legend, malicious creatures called Kallikantzaroi sometimes play troublesome pranks at Christmas time. In order to get rid of them, salt or an old shoe is burnt. The pungent burning stench drives off, or at least helps discourage, the Kallikantza
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The first postage stamp to commemorate Christmas was issued in Austria in 1937.
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Nearly 60 million Christmas trees are grown each year in Europe.
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