Black Friday is the day following Thanksgiving Day in the United States, and is the beginning of the Christmas shopping season. On this day many U.S. retailers open very early, and offer promotional sales to start the shopping season.
History and Origin
The term Black Friday originated in Philadelphia, where it originally was used to describe the heavy pedestrian and vehicle traffic, which would occur on the day after Thanksgiving.
Use of the term began in Philadelphia, and then spread to other cities around 1975.