It's official: Amazon Prime Big Deal Days - aka one of the biggest shopping events of the fall season - is happening once again. And we have a feeling it's going to be bigger, better and more impressive than last year's sale. Amazon Prime Big Deal Days will run from October 7, 2025, through October 8, 2025, giving you two full days to score up to 91% off fashion, beauty, tech, home and more. It's like Black Friday - but in October. But here's the thing: Some of the best deals are already live.