Martin Luther King Jr. Day, a federal holiday on which many people, including students, are off. It's also a day when many may reflect on the civil rights leader and his famous "I Have a Dream" speech.

Houston has doubled its celebration of Dr. Martin Luther King's legacy with two parades on the same day and at the same time. Here's why.

Here is what to know about what businesses and services that will remain open and which ones will take the day off for Martin Luther King Jr. Day.

As a federal and state-observed holiday for the U.S. Postal Service, post offices will be closed on Martin Luther King Jr. Day, so you will not receive your regular mail or packages. USPS priority mail will be the only service in operation. Banks and their branches will be closed as well for the holiday.

The Pentagon joined the scramble by federal agencies trying to conform to President Trump’s war on diversity programs.

The Defense Department intelligence agency has paused observances of Martin Luther King Jr. Day, Pride Month, Holocaust Days of Remembrance and other cultural or historical annual events in response to President Donald Trump’s ban on diversity,

The Defense Intelligence Agency's pause comes in response to President Trump’s ban on diversity, equity and inclusion programs in the federal workplace.