Martin Luther King Jr. Day, a federal holiday designated as a national day of service to encourage all Americans to volunteer and improve their communities, according to the National Museum of African American History and Culture.

Martin Luther King Jr. Day is a federal holiday, but some shipping and delivery services may still be operational. Here's what we know.

President Ronald Reagan signed the King Holiday Bill into ... For more information, call 1-800-714-8779 or visit mnx.com. Some FedEx pickup and delivery services will be available on Jan. 20 ...