Which holiday celebrates the birthday of Martin Luther King Jr.?

Martin Luther King Jr. Day is specifically designated to celebrate the birthday of the civil rights leader Martin Luther King Jr. This holiday is observed on the third Monday in January, close to King’s actual birthday on January 15. The day honors his contributions to civil rights and his efforts towards achieving equality and justice through nonviolent activism.

In contrast, the other listed holidays have different historical significances: Independence Day commemorates the adoption of the Declaration of Independence, Memorial Day honors those who have died in military service, and Labor Day celebrates the contributions of workers and the labor movement. Each of these holidays serves distinct purposes in recognizing various aspects of American history and culture, but none are related to the legacy of Martin Luther King Jr.