Martin Luther King Jr. Day, a federal holiday designated as a national day of service to encourage all Americans to volunteer and improve their communities, according to the National Museum of African American History and Culture.

While most government functions will not be operating on Monday, most grocery stores, big box stores and restaurants will remain open. Major chain stores such as Target, Costco, Walmart, The Home Depot, Jewel-Osco and Mariano's will remain open on the holiday.