Black Friday 2009

Origin of the term
Black Friday as a term has been used in multiple contexts, going back to the nineteenth century, where it was associated with a financial crisis in 1869 in the United States. The earliest known reference to "Black Friday" to refer to the day after Thanksgiving was made in a 1966 publication on the day's significance in Philadelphia:
JANUARY 1966 -- "Black Friday" is the name which the Philadelphia Police Department has given to the Friday following Thanksgiving Day. It is not a term of endearment to them. "Black Friday" officially opens the Christmas shopping season in center city, and it usually brings massive traffic jams and over-crowded sidewalks as the downtown stores are mobbed from opening to closing.