October’s “Prime Day” event (now called Prime Big Deal Days) typically runs for 48 hours, or 2 full days.

How long is October Prime Day?

  • The standard format for Amazon’s big Prime events is a 48-hour sale, even though it’s branded as a “day.”
  • In October 2025, Prime Big Deal Days ran over two days (Oct. 7–8) and ended at 11:59 p.m. PT on the second day.
  • Recent ecommerce calendars still describe the “Prime Day standard” as a 48‑hour event, with only occasional experiments (like July 2025) going longer.

Quick timeline context

  • October Prime Day / Prime Big Deal Days usually falls in the first or second week of October and runs across two consecutive days.
  • Deals often “leak” before and linger after, but the official October Prime Day window itself is about 48 hours.

Bottom line: if you are planning time off or watching for deals, assume that October Prime Day lasts 2 days, with extra promos just before and after that official window.

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