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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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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Rudolph the red-nosed reindeer was invented for a US firm's Christmas promotion in 1938.
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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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One town in Indiana is called Santa Claus. There is also a Santa, Idaho.
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Christmas trees become popular in the UK from 1841 when Prince Albert erected a tree in Windsor Castle following a German tradition. Fir trees have been decorated at Christmas time in Germany since the 8th century.
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The first postage stamp to commemorate Christmas was issued in Austria in 1937.
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The Queen's Christmas speech was first televised in 1957.
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