Celebrate and Serve Virtually during Martin Luther King Jr. Day Celebrate and Serve Virtually during Martin Luther King Jr. Day Today, Monday, January 18, 2021, is Martin Luther King Jr. Day. It is a federal holiday that is celebrated on the third Monday of January. This is a day to celebrate and honor the legacy of a phenomenal great civil rights leader’s life. Many celebrate Martin Luther King Jr. Day with an MLK Day of Service. Even during a pandemic, there are ways for you to celebrate and to serve your communities. Click here for the details on the Tuscaloosa Chapter of the Southern Christian Leadership Conference commemorates the observance of Dr. Martin Luther King’s birthday with what has been coined as Unity Day.