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.

Monday is Martin Luther King Day. Here's what to know about the businesses and services that are closed for the holiday in Arizona.

But in revoking President Lyndon Johnson’s 1965 Executive Order 11246 that launched our decades-long imposition of de facto racial quotas under the euphemism “affirmative action,” Trump has gone beyond the boldest imagination of any previous administration.

With all the attention, deservedly, on President Trump and what he intends to do with his defiant return to the White House, there’s a more than good chance we’ll spend the next four years consumed once again by all things Trump.

The most transformational post-World War II president, Ronald Reagan, laid the foundation and put the wheels in motion to propel the country exactly to where we are today.

Democrats don't have a transformational leader to vanquish MAGA and risk being befuddled by President Trump's shock-and-awe campaign.

Former President Jimmy Carter’s recent death and funeral reminded Americans of his legacy and the values that motivated his public service.

The rug, which was in place during Ronald Reagan’s administration and during Trump’s first term, was reinstalled during Trump’s inauguration ceremony, according to CBS News. The Resolute Desk had to be partially disassembled in order to facilitate its return.

Although Martin Luther King Jr. Day is one of 13 federal holidays that is observed, inauguration day is not a federal holiday. Only employees who work in Washington D.C. observe the day by having the day off.

MLK Day will be observed on Monday, Jan. 20 this year. U.S. Postal Service post offices will be closed on Monday, Jan. 20, and mail will not be delivered on the day, the USPS told USA TODAY. The USPS will resume regular operations on Tuesday, Jan. 21.

Though the holiday is young, this will only be the 25th year that all 50 states recognize it together. Here's what's open and closed on Martin Luther King Jr. Day.