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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The abbreviation Xmas isn't irreligious. The letter X is a Greek abbreviation for Christ.
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Electric lights for trees were first used in 1895.
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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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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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Black Friday in the UK is the Friday before Christmas. Instead of shopping, many people get very drunk!
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The first postage stamp to commemorate Christmas was issued in Austria in 1937.
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Carols began as an old English custom called wassailing, toasting neighbours to a long life.
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