What is the frequency of mail delivery by USPS on weekends?

The frequency of mail delivery by the United States Postal Service (USPS) primarily occurs on weekdays, which means that there is no regular mail delivery on Saturdays and Sundays. Deliveries are made from Monday to Friday, and while some USPS services operate on Saturdays, such as Priority Mail Express and specific package services, standard mail delivery does not occur.

The choice indicating that there is no mail delivery on weekends accurately captures the typical service schedule for USPS. It's important to note that while some limited services are available on Saturdays, and no services are provided on Sundays for regular mail, the overall standard practice of the USPS ensures that weekdays are the primary days for delivery, making the correct understanding crucial for expectations regarding mail delivery timing.