Yes obviously, but the point Daniel is making is that Black Friday sales - what people often refer to as just "Black Friday" even if it's not really correct - will start beforehand. And they will. Probably on the Monday of that week. Different retailers operate differently, and often different suppliers will stagger their promotional launch dates (which generally means retailer support - among other things brands give money to retailers for each unit of specific items sold, which can usually be claimed as a discount on a future order with that supplier - this allows the retailer to price the item lower than would normally be possible) as well.