how long does prime day last

Amazon Prime Day length varies depending on the event time of year. The main Prime Day in July 2025 lasted four days, from July 8 to July 11. However, the October Prime Day event known as Prime Big Deal Days runs for only 48 hours (two days). For example, in October 2025, it started at 12:01 a.m. PT on October 7 and ended at 11:59 p.m. PT on October 8. Generally, the July Prime Day is longer (up to four days recently), while the October event is shorter (two days).