Prime Days refer primarily to Amazon Prime Day, which is an annual shopping event exclusively for Amazon Prime members. It features significant discounts, deals, and promotions on a wide range of products and brands, typically held in mid-July since its inception in 2015. The event usually lasts for 48 hours but has been extended in some years, such as in 2025 when it lasted four days from July 8 to July 11. Amazon Prime Day is designed to offer a volume of deals greater than Black Friday, celebrating Prime members with exclusive sales on various items.
More recently, Amazon also hosts a second event known as Prime Big Deal Days, occurring in October (e.g., October 7-8, 2025). This autumn event is similar to Prime Day, with large discounts exclusive to Prime members, serving as an additional shopping occasion apart from the traditional summer Prime Day.
In summary, Prime Days are major sales events curated by Amazon for Prime members, where they can access exclusive discounts over a limited number of days twice a year.