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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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 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 Christmas card was designed in 1843 by J.C. Horsley.
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One town in Indiana is called Santa Claus. There is also a Santa, Idaho.
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English Puritan leader Oliver Cromwell banned Christmas between 1647 and 1660 because he believed such celebrations were immoral for the holiest day of the year.
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Rudolph the red-nosed reindeer was invented for a US firm's Christmas promotion in 1938.
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