The biggest change is that this year's event will be four full days. It starts Tuesday, July 8 and runs through Friday, July 11. The other big change -- each of the four days will feature "Today's big deals," from major brands from Samsung to Levi's jeans, according to Amazon.

If your headphones are one update away from quitting, lucky for you, Amazon's annual summer super-sale is off to an early start with savings on Samsung, Sony, and more.