The first Christmas card was designed in 1843 by J.C. Horsley.
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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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The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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The first postage stamp to commemorate Christmas was issued in Austria in 1937.
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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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The Queen's Christmas speech was first televised in 1957.
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There are 13 Santas in Iceland, each leaving a gift for children. They come down from the mountain one by one, starting on December 12 and have names like Spoon Licker, Door Sniffer and Meat Hook.
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Coca Cola was the first beverage company to use Santa for a winter promotion.
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