In the 1950s overworked police officers in Philadelphia coined the term "Black Friday" as they had to work a lot the day after Thanksgiving.The city was hosting an important football match the following Saturday and the streets were congested.As a result, police officers were not allowed to take the day off and they referred to that day as "Black Friday".
Later "Black Friday" was also used to describe a stock market catastrophe that took place in 1869 when the price of gold plummeted, causing the market to collapse.
Nowadays the term has gained popularity and everybody sees it as the kick off of the Christmas shopping season, a day full of special deals and heavy discounts. It is black because it involves moving from "the red" ( a loss) to "the black" ( a profit) as records were kept by hand using red or black ink.
If you can not get what you want, you can always try online shopping.....on Cyber Monday!!!!