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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Black Friday in the UK is the Friday before Christmas. Instead of shopping, many people get very drunk!
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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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At Christmas, it is traditional to exchange kisses beneath the mistletoe tree. In ancient Scandinavia, mistletoe was associated with peace and friendship. That may account for the custom of "kissing beneath the mistletoe".
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In 1999, residents of the state of Maine in America built the world's biggest ever snowman. He stood at 113ft tall.
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Gold-wrapped chocolate coins commemorate St Nicholas who gave bags of gold coins to the poor.
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The Christmas tree displayed in Trafalgar square in London is an annual gift to the UK from Norway since 1947. The Norwegian spruce given is a token of appreciation of British friendship during World War II from the Norwegian people.
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Carols began as an old English custom called wassailing, toasting neighbours to a long life.
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