The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
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'Klaxon' is a name that does not belong to one of Santa's reindeer. A klaxon is actually a powerful electric horn. Its name comes from a German word meaning "shriek".
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Carols began as an old English custom called wassailing, toasting neighbours to a long life.
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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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The world's tallest Xmas tree at 221ft high was erected in a Washington shopping mall in 1950.
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The Queen's Christmas speech was first televised in 1957.
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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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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.
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