Black Friday is the day following Thanksgiving Day in the United States, traditionally the beginning of the Christmas shopping season. On this day, many retailers open very early, often at 4 a.m., or earlier, and offer promotional sales to kick off the shopping season, similar to Boxing Day sales in many Commonwealth countries. Black Friday is not actually a holiday, but many employers give their employees the day off, increasing the number of potential shoppers. It has routinely been the busiest shopping day of the year since 2005, although news reports, which at that time were inaccurate, have described it as the busiest shopping day of the year for a much longer period of time.
The day’s name originated in Philadelphia, where it originally was used to describe the heavy and disruptive pedestrian and vehicle traffic which would occur on the day after Thanksgiving. Use of the term started before 1966 and began to see broader use outside Philadelphia around 1975. Later an alternative explanation began to be offered: that “Black Friday” indicates the point at which retailers begin to turn a profit, or are “in the black.”
Because Thanksgiving falls on the fourth Thursday in November in the United States, the day after occurs between the 23rd and the 29th of November.