Amazon Prime Day is a summer sale that was first introduced in 2015. At its start, Prime Day was a single-day event meant to celebrate the company’s 20th anniversary. Over the years, it’s expanded into a 48-hour event, but this year it’s getting another extension: Amazon Prime Day 2025 will be four days long.

Prime Day is a great time to buy a Dyson — although the newest Gen5Detect is still expensive, older models like the V8 and V11 are just as reliable and often go on sale for 30 percent off or more. This cordless pet vacuum is one of our favorites overall, and it’s now on sale for a fraction of the price of a Dyson.

Prime Day 2025 is nearly here, and Amazon is bumping up the number of shopping days to score deals. Here's what we know about the sale.