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.

The holiday is celebrated each year on the third Monday of January, falling on Jan. 20 this year, which coincides with the presidential inauguration.

Every year we honor the legacy of Martin Luther King Jr. in January. Here's everything you need to know about the holiday.

The U.S. is set to mark Martin Luther King Jr. Day, the federal holiday set aside to honor the life of the civil rights icon. But in Alabama and Mississippi, Monday is also Robert E. Lee Day in honor of the Confederate general.

More than 50 years after he died at age 39 from an assassin’s bullet, the Rev. Dr. Martin Luther King Jr. endures as one of the most influential and recognizable figures in American history. His rise from the pulpit of the Ebenezer Baptist Church in Atlanta to his groundbreaking work as a founder and leader

Several Memphis Grizzlies players have been introduced to Dr. Martin Luther King Jr. in different ways through their varied upbringings.

Martin Luther King gave over 2,500 public speeches during his lifetime – many of them were delivered without a manuscript and with few notes.

Celebrate Martin Luther King Jr.'s legacy with a look back at 15 of his most powerful quotes, including the iconic 'I Have a Dream' speech and more.

WHERE...Portions of East Arkansas, North Mississippi, and West Tennessee. * WHEN...Until noon CST today. * IMPACTS...Very cold temperatures along with low wind chill values can lead to hypothermia with prolonged exposure.

WHERE...Portions of East Arkansas, North Mississippi, and West Tennessee. * WHEN...Until noon CST today. * IMPACTS...Very cold temperatures along with low wind chill values can lead to hypothermia with prolonged exposure.

Martin Luther King Jr. Day is on Jan. 20 ... When the federal holiday was adopted in the 1980s, Mississippi lawmakers opted to add it to an existing holiday honoring Confederate general Robert ...