MLK Jr. Day is a federal holiday, so most government offices across the nation are closed and the Postal Service won't be delivering mail.

As a federal and state-observed holiday for the U.S. Postal Service, post offices will be closed on Martin Luther King Jr. Day, so you will not receive your regular mail or packages. USPS priority mail will be the only service in operation. Banks and their branches will be closed as well for the holiday.