A Temple professor
Frank Farley posits that the term "Black Friday" originated in the City of Brotherly Love.
In an interview with NBC10, he said that the term was coined by the Philadelphia Police Department after the city was overrun with fans coming to town for the Army-Navy game. With the game typically held on a Saturday, the city was full of rowdy fans on Friday — creating chaos and overrunning retail stores.
"The day before, people are rushing into Philly for the game," Farley told NBC10. "The police are overwhelmed. The idea of this day — that was a very bad day for the cops — became labeled Black Friday."
Original source: Philadelphia Business Journal
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