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

Black Friday has become one of the most significant shopping events in retail history, generating billions in sales each year. But this massive shopping phenomenon has fascinating historical origins that many consumers might not be aware of. Test your knowledge about how this retail tradition began and evolved to become the global shopping festival we know today.

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A financial crisis when stock markets crashed on Friday, September 24, 1869
The day retail stores historically moved from operating at a loss ('in the red') to making a profit ('in the black')
A term coined by Philadelphia police in the 1950s referring to factory workers calling in sick after Thanksgiving
A marketing campaign created by Macy's in 1924 to promote their first Thanksgiving Day Parade