7 Socially Distanced Ways to Commemorate MLK Jr. Day 2021 Samana Siddiqui Martin Luther King Jr. Day is commemorated annually in the United States on the third Monday of January, in honor of the January 15 birthday of Dr. Martin Luther King Jr., who was a leader of the American civil rights movement. Read more about 7 Socially Distanced Ways to Commemorate MLK Jr. Day 2021