The days considered working days by Amazon, excluding weekends and nationally observed holidays, directly impact order processing, fulfillment, and delivery timelines. For example, an order placed late Friday evening may not begin processing until the following Monday, assuming it is not a holiday.
Understanding these operational days is crucial for customers to accurately estimate delivery times, especially during peak seasons like the holidays when order volumes surge. This knowledge helps manage expectations and plan accordingly. Prior to wider internet adoption, businesses operated primarily within these constraints; however, while online commerce is available 24/7, the physical logistics are still subject to variations based on these parameters.