What was the original meaning of the term 'Black Friday' before it became associated with post-Thanksgiving shopping?

Black Friday has become a global shopping phenomenon marking the beginning of the holiday shopping season. But how much do you know about its origins and evolution? This trivia question tests your knowledge about one of retail's most significant events that drives billions in revenue and shapes business strategies across industries. Even if you're a seasoned shopper, the true origin of this retail holiday might surprise you!

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A 1950s term used by Philadelphia police to describe the chaotic traffic and crowds the day after Thanksgiving
The day retail businesses finally went from operating at a loss ('in the red') to making a profit ('in the black') for the year
A marketing term created by retailers in the 1970s to promote post-Thanksgiving sales
A reference to the stock market crash of 1929 that occurred on a Friday after Thanksgiving