 It is traditionally considered to commence on the day after American Thanksgiving, a Friday colloquially known as either Black Friday or Green Friday.This is widely reputed to be the busiest shopping day of the entire calendar year.However, in 2004 the VISA credit card organization reported that over the previous several years VISA credit card spending had in fact been 8 to 19 percent higher on the last Saturday before Christmas Day (i.e., Super Saturday) than on Black Friday.