The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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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 twelve days of Christmas are the days between Christmas Day and Epiphany (6th of January) and represent the length of time it took for the wise men from the East to visit the manger of Jesus after his birth.
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Robins on cards were a joke 150 years ago when postmen wore red tunics and were named after them.
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One town in Indiana is called Santa Claus. There is also a Santa, Idaho.
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The abbreviation Xmas isn't irreligious. The letter X is a Greek abbreviation for Christ.
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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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