Fall “Prime Day” is Amazon’s second big Prime event in the year, now branded as Prime Big Deal Days , and it usually lands in early– to mid‑October as a 48‑hour sale. Exact dates are announced a few weeks before the event each year, so upcoming-year timings are still estimates.

When Is Fall Prime Day?

  • Marketing sites and ecommerce calendars expect Amazon’s fall Prime event (Prime Big Deal Days) to continue in early October , typically over two days (Tuesday–Wednesday).
  • For reference, recent fall events ran around October 11–12, 2022 and October 7–8, 2025 , reinforcing that early‑October pattern.

So if you are planning ahead and asking “when is fall Prime Day,” the safest working assumption is a 48‑hour Prime Big Deal Days event in early October , with the exact dates only confirmed closer to the time via Amazon’s official announcements.

Information gathered from public forums or data available on the internet and portrayed here.