Where did it come from and how did it get its name?
Black Friday comes from the United States, where the term was originally used to refer to the panic of September 24, 1869, when speculators Jay Gould and James Fisk tried to corner the gold market on the New York Stock Exchange. In general, the adjective “black” has been applied to days on which the stock market caused great losses and chaos in the U.S. economy.
In the 1960s, Philadelphia policemen began calling the Friday that fell between Thanksgiving (Thursday) and the Army-Navy Game (historically played on the Saturday after Thanksgiving) “Black Friday”. This game between the teams of the Navy and Army academies is one of the great classics of American football and is played in Philadelphia, roughly equidistant from the two academies. The large crowds that poured into the city on Friday to spend the night partying before the game coincided with the day that officially began the Christmas shopping season (which local businesses took advantage of to attract more shoppers), causing massive traffic jams as well as accidents, fights and even robberies. The city was even darker with smoke from all the pollution caused by the influx of cars, and police starting calling the day Black Friday, a name that was popularized and now used throughout the United States.
Recently, retailers –objecting to the derisive use of the term– use Black Friday to mean the beginning of the period when the numbers in their financial records go from “in the red” (loss) to “in the black” (profit) as a result of the huge amount of sales made on this discount shopping day.