Advertised as different from all the other black firday sales that day by K-Mart, as said by mr.blue lightbulb. However, it's pretty much, more or less, the same.
K-Mart's blue lightbulb : Black firday? Ha! we have blue friday.
The first friday of the school year. Celebrated by wearing blue.
Richard - "hey linds you ready for Blue Friday?"
Lindsey - "I've been waiting all week."