Martin Luther King Jr. Day is a federal holiday in the United States that honors the civil rights leader Martin Luther King Jr.

It is observed annually on the third Monday of January, close to King's birthday on January 15.

The day is a celebration of Martin Luther King Jr.'s life and achievements, as well as a reminder of the ongoing struggle for civil rights, equality, and justice.

Many people observe Martin Luther King Jr. Day by participating in community service activities, attending events that honor King's legacy,

or reflecting on the principles he advocated, such as nonviolent protest and equality for all.

Schools and businesses may also hold special events or close for the day in recognition of this important figure in American history.

The holiday was signed into law by President Ronald Reagan in 1983, and it was first observed as a federal holiday on January 20, 1986. Martin Luther King Jr.

Day is not only a time to celebrate the achievements of one individual but also to reflect on the broader struggle for civil rights and justice in the United States.