Jan. 20 is Martin Luther King Jr. Day in the United States. Here's what's open and closed during the national holiday.

Martin Luther King Jr. Day on January 20 coincides with Trump’s inauguration. Government offices, postal services, and financial institutions will be closed, but retailers like Costco, Walmart, and Target will remain open.

Martin Luther King Jr. Day is a federally recognised holiday in the US, ensuring the closure of most government offices and nonessential services.

Martin Luther King Jr. Day is observed in the United States on the third Monday of January. This year coincides with the inauguration of President-elect Donald Trump. Here is what to know about what businesses and services will remain open and which ones will take the day off.

Martin Luther King Jr. Day is a federal holiday, so some businesses will be closed in Connecticut. Here's what you need to know.

The Anthony, Canutillo, Clint, El Paso, Gadsden, Fabens, Ysleta and Socorro independent school districts will be closed for the holiday, as well as Texas Tech University Health Sciences Center El Paso and the University of Texas at El Paso.

Martin Luther King Jr. Day is always celebrated on the third Monday in January. It also happens to be Inauguration Day, which is always held on January 20th per the U.S. Constitution. The two typically don’t coincide, but they just so happen to fall on the same day this year.

City of Greensboro honors Martin Luther King Jr.'s legacy with annual memorial breakfast CNN’s Ben Wedeman dives deep underground in Rome to explore the Aqua Virgo, an ancient aqueduct that continues to supply water to the Trevi Fountain and other landmarks.

Communities across the Upstate are showing their appreciation for Dr. Martin Luther King Jr. in many ways. Read more: <a href="

Postal service facilities will be closed for residential and business deliveries on Martin Luther King Jr. Day. Priority Mail Express, however, will be delivered, according to the USPS website. Most major retailers, such as Target, Walmart and Costco will remain open, but some locations may have modified hours.

Jan. 20 marks a federal holiday, but it's not for Inauguration Day -- it's in observance of Martin Luther King Jr. Day.