Wikipedia presents both origin stories, but the accounting version (black ink) does appear to be a 1980s back-formation trying to put a nicer spin on the name.

Wikipedia presents both origin stories, but the accounting version (black ink) does appear to be a 1980s back-formation trying to put a nicer spin on the name. http://en.wikipedia.org/wiki/Black_Friday_(shopping)#Origin_of_the_term http://en.wikipedia.org/wiki/Black_Friday_(shopping)#Origin_...