Martin Luther King Jr. Day is a U.S. federal holiday observed on the third Monday in January, honoring the life and achievements of the civil rights leader, often marked by community service, marches, and educational events focused on equality and social justice, encouraging Americans to volunteer as a “day on, not a day off”. It commemorates his birthday (January 15, 1929) and serves as a national day to reflect on his legacy and continue his work for a “beloved community”.