How to Find the Best Black Friday Deals. Black Friday is the Day after Thanksgiving in the United States. It’s called “Black Friday” because historically, this is the day that all stores go from being in the “red” to being in the “black rdquo; on their balance sheets. It’s also the day the Christmas shopping season officially starts, so many stores open early and offer large discounts and sales on small quantities of items. Here are some tips to Finding the Best Black Friday Deals on the items you want to buy.