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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Rudolph the red-nosed reindeer was invented for a US firm's Christmas promotion in 1938.
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The first postage stamp to commemorate Christmas was issued in Austria in 1937.
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Gold-wrapped chocolate coins commemorate St Nicholas who gave bags of gold coins to the poor.
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Nearly 60 million Christmas trees are grown each year in Europe.
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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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