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 definition of a white Christmas in the UK is for a single snow flake (perhaps amongst a shower of mixed rain and snow) to be observed falling in the 24 hours of December 25th.
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Rudolph the red-nosed reindeer was invented for a US firm's Christmas promotion in 1938.
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Santa Claus has many different names around the world including Father Christmas in the UK, Pere Noel in France, Kriss Kringle in Germany, La Befana in Italy, Julinesse in Denmark, Dedushka Moroz (meaning Grandfather Frost) in Russia and the Three Kings i
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7.6 million Christmas trees are sold each year.
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Although now mostly vegetarian, in Victorian times, mince pies were made with beef and spices.
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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 sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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