Post Office Closed Mlk Day 2025. Martin luther king day is observed every year on the third monday of january — on january 20 this year. Mail will not be running as usps does not deliver on sundays unless it is a priority express package that has paid for sunday.

Martin luther king day also called mlk day, king day, and reverend dr. Find usps holiday service schedule details, including local post office hours, mail delivery, and blue collection boxes pickup on christmas and new year’s.