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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Many theologians estimate that Jesus wasn't born on December 25 but sometime in September between 6BC and 30AD.
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The Queen's Christmas speech was first televised in 1957.
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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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Electric lights for trees were first used in 1895.
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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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