So I've heard people refer to this Friday as "Black Friday" because it's the biggest shopping day of the year. But if we're going to assign colors to days, shouldn't it be "Green Friday" due to the high rate of monetary exchange? I mean, when I think of days that have been assigned the color black, I think of stock market crashes.

If I'm being a complete stupid-head and am missing the point of the color, feel free to enlighten me.