postal service deliver on sunday

postal service deliver on sunday only for select services such as Priority Mail Express and certain Amazon packages handled by USPS. Regular First-Class and Priority Mail items are not delivered on Sundays. This Sunday delivery option is especially beneficial during holiday seasons or for time-sensitive orders. It’s available in select metropolitan areas where USPS has sufficient volume to support expanded delivery hours. Customers can check eligibility via USPS’s online tools or through third-party tracking platforms.