This week the Postal Service announced plans to move into one of the few remaining frontiers of package delivery – Sundays.
Sunday delivery isn’t exactly new. The Postal Service delivers 7 days a week using the premium Priority Mail Express product. So, what’s really new is the low cost of the service – making it a solid option for consumers.
https://www.uspsoig.gov/blog/no-more-day-rest-postal-package-delivery
Also see:
PRIORITY MAIL EXPRESS DELIVERY ON SUNDAYS/HOLIDAYS
Effective January 10, 2017
The destination ZIP Codes listed support scheduled delivery of Priority Mail Express
shipments on Sundays and/or holidays. It must be used in conjunction with the Priority Mail
ExpressdDirectory.