The day after Thanksgiving has long been known to shoppers and retailers as Black Friday. Researcher Bonnie Taylor-Blake has traced the term's earliest use to an article in a 1951 factory trade magazine, in reference to the number of absent employees following the holiday. The modern use, associating the term with the busiest shopping day of the year, is said to have originated in Philadelphia in the 1960s, when police officers used it to describe the added crime and traffic accidents that came with the crowds. Whatever the true origins, the concept of after-Thanksgiving sales is far older.
Retrospective: Black Friday deals