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

The holiday that celebrates the birthday of Martin Luther King, Jr. is Martin Luther King, Jr. Day. This holiday is observed on the third Monday of January each year, close to the civil rights leader's actual birthday on January 15. It was established to honor his contributions to the civil rights movement and to celebrate his legacy of promoting equality and justice for all Americans, particularly in terms of racial equality.

The significance of this holiday lies in its focus on the values that King advocated, including nonviolence, social justice, and community service. Schools, workplaces, and communities often engage in activities to reflect on his teachings and further the cause of civil rights.

In contrast, the other options represent different holidays that do not relate to Martin Luther King, Jr. Independence Day commemorates the Declaration of Independence from British rule, Memorial Day honors and remembers military personnel who have died in service, and Veterans Day is a day to acknowledge and celebrate all United States military veterans. Each of these holidays has its unique significance and themes, separate from the recognition of Martin Luther King, Jr. Day.