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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Gold-wrapped chocolate coins commemorate St Nicholas who gave bags of gold coins to the poor.
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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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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 abbreviation Xmas isn't irreligious. The letter X is a Greek abbreviation for Christ.
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Nearly 60 million Christmas trees are grown each year in Europe.
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