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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Many theologians estimate that Jesus wasn't born on December 25 but sometime in September between 6BC and 30AD.
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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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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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One town in Indiana is called Santa Claus. There is also a Santa, Idaho.
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Rudolph the red-nosed reindeer was invented for a US firm's Christmas promotion in 1938.
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Although now mostly vegetarian, in Victorian times, mince pies were made with beef and spices.
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