What is Prime Day? Prime Day is a new sales holiday invented by Amazon. It was held on a Wednesday in the middle of the summer. It proved a huge success for the company. How successful was Prime Day? It sold more units than the biggest Black Friday ever back in 2014. You have to be an Amazon Prime member to take advantage of the discounts, meaning you pay an annual fee of $99 for free two-day shipping and other benefits. Not everyone is happy with Prime Day. Some critics say that Amazon didn’t offer enough in-demand tech gadgets. Some say Amazon was selling useless crap. Despite the criticism, Amazon did quite well that they are thinking about bringing it back. No details yet as to when that will take place again.