Monday will be an especially noteworthy day on America’s calendar — and it’s one that will be marked by various closings, including that of financial markets.

The nation will honor Dr. Martin Luther King, Jr. on Monday as part of a National Day of Service to pay tribute to his legacy. The day is marked each year by a federal holiday when many businesses close.

U.S. stock markets will be closed on Monday, Jan. 20, in observance of the Martin Luther King Jr. Day holiday. The Nasdaq and New York Stock Exchange will both be closed on the federal holiday but will reopen for regular trading hours on Tuesday, Jan. 21.