• United States
Well it's always on a Friday and the black refers to a marketing marking indication which is sales related, as far as I know. Black Friday is the day when retailers finally begin to turn a profit for the year. In accounting terms, operating at a loss (losing money) is called being “in the red" because accountants traditionally used red ink to show negative amounts (losses). So the opposite would be "black" which represents profit. That's why they call it Black Friday.