Black Friday in the UK is the Friday before Christmas. Instead of shopping, many people get very drunk!
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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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Many theologians estimate that Jesus wasn't born on December 25 but sometime in September between 6BC and 30AD.
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The first Christmas card was designed in 1843 by J.C. Horsley.
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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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Robins on cards were a joke 150 years ago when postmen wore red tunics and were named after them.
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Electric lights for trees were first used in 1895.
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