Today is Martin Luther King. Jr Day, Martin Luther King Jr. Day is an American federal holiday marking the birthday of Martin Luther King Jr. It is observed on the third Monday of January each year, which is around King’s birthday, January 15. MLK was an influential American civil rights leader, who is well-known for his campaigns to end racial segregation on public transport and for racial equality in the United States. To celebrate the life and achievements of Martin Luther King Jr., keep scrolling for some of his best quotes.