The day after Thanksgiving in the US, and typially considered the busiest shopping day of the year. The term "black" is said to come from a large number companies that don't generate profits until that Friday, when they swing from the red into the black.
Disney exec: If we don't boost sales, we'll stay in the red and lose our bonuses!
Other VPs: don't worry, the day after thanksgiving we'll sell enough crap to get into the black.
exec: Thank God for Black Friday!
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