Sunset
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As of about three years ago, we get Black Friday in Europe now. I don't know if it's a fashion thing, or if it's just being pushed by lazy executives at US-based multinationals who like the world to look the same everywhere.
It tends to be untranslated (i.e., what's on the poster not "vendredi noir", but "Black Friday"). Almost nobody has a clue what it means because we don't have Thanksgiving and we get plenty of vacation time, so we don't need a semi-holiday to do our shopping. In fact since not many Europeans go shopping on a Friday, "Black Friday" typically extends over 4 or 7 days, and some chains call it "Black days".
It has nothing to do with Thanksgiving. It's just that the time frame is close.
It really has to do when the ink turns black from red in the books of sellers. An accounting thing.