Martin Luther King Day is a U.S. federal holiday held on the third Monday in January, honoring Dr. Martin Luther King Jr., a minister and civil rights leader who dedicated his life to ending racial segregation and discrimination in America.

Dr. King believed in changing unjust laws through peaceful protest rather than violence. In the 1950s and 1960s, he led marches, organized boycotts, and gave powerful speeches calling for equal rights for Black Americans. His most famous speech, “I Have a Dream,” delivered in 1963 to hundreds of thousands of people in Washington, D.C., painted a vision of an America where people would be judged by their character rather than the color of their skin. He was assassinated in 1968 at age 39.

The holiday was established in 1983 and first observed in 1986, making King the first Black American to be honored with a federal holiday. Many Americans mark the day with volunteer service in their communities, following King's belief that everyone can make a positive difference. Schools and organizations often use the day to teach about the civil rights movement and King's philosophy of peaceful activism. Some people call it a “day on, not a day off,” emphasizing service and reflection over simply taking time away from work or school.