Black Friday, the day after Thanksgiving, has become a quasi-holiday in the United States that’s marked by consumer discounts, shopping, and violence, and it's grown and metastasized so much that Black Friday isn't a mere day anymore: it's a week,

In the 1950s, Philadelphia police used the term "Black Friday" to describe a day of chaos that ensued on the day after Thanksgiving, when mass crowds of suburban shoppers flooded the city before the Army-Navy football game held on the Saturday after the holiday every year.

Black Friday is a day that follows Thanksgiving Day in the United States, which falls on the fourth Thursday of November.