does usps run on christmas day

Unfortunately, the United States Postal Service (USPS) does not operate on Christmas Day. It's a federal holiday, so all government agencies, including the USPS, are closed on December 25th. The postal service usually resumes operations the following day, December 26th, and delivers mail and packages according to their usual schedule. So if you have something that needs to be delivered on Christmas, it's best to plan ahead and mail it early!