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 first Christmas card was designed in 1843 by J.C. Horsley.
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Gold-wrapped chocolate coins commemorate St Nicholas who gave bags of gold coins to the poor.
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The Christmas tree displayed in Trafalgar square in London is an annual gift to the UK from Norway since 1947. The Norwegian spruce given is a token of appreciation of British friendship during World War II from the Norwegian people.
35
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 world's tallest Xmas tree at 221ft high was erected in a Washington shopping mall in 1950.
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