【How-to】When does usps open - Howto.org

They start their deliveries around 9:00 AM and finish at about 5:00 PM. In general, most USPS packages arrive by 2:00 PM on Saturdays. However, they can be delivered as late as 6:30 PM during peak seasons, like Christmas, or during times of disruption, like inclement weather. What is this?