The abbreviation Xmas isn't irreligious. The letter X is a Greek abbreviation for Christ.
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Carols began as an old English custom called wassailing, toasting neighbours to a long life.
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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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Although now mostly vegetarian, in Victorian times, mince pies were made with beef and spices.
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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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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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The twelve days of Christmas are the days between Christmas Day and Epiphany (6th of January) and represent the length of time it took for the wise men from the East to visit the manger of Jesus after his birth.
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