Carols began as an old English custom called wassailing, toasting neighbours to a long life.
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7.6 million Christmas trees are sold each year.
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Gold-wrapped chocolate coins commemorate St Nicholas who gave bags of gold coins to the poor.
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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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Many theologians estimate that Jesus wasn't born on December 25 but sometime in September between 6BC and 30AD.
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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 world's tallest Xmas tree at 221ft high was erected in a Washington shopping mall in 1950.
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