(FOX NEWS) -- The United States Postal Service will slow down delivery speeds for nearly one-third of first-class packages as part of new service standards slated to take effect starting May 1.

WASHINGTON (WJLA) — With the holiday season underway, some families have begun preparing care packages and letters for their long-distance loved ones. But if you want that gift in their hands by Dec.

The U.S. Postal Service said “refined services standards” will be put in place for certain types of mail. The changes will take effect in a little more than a month and covers first-class mail, ...