Inauguration Day this year happens to fall on the same day as the observance of Dr. Martin Luther King Jr. Day.

Inauguration Day occurs every four years on Jan. 20, or on Jan. 21 if the 20th falls on a Sunday. Trump, the nation’s 45th and soon-to-be 47th president, will take the oath of office on Jan. 20 at the U.S. Capitol building in Washington, D.C.

By tradition, the outgoing president accompanies the president-elect to the Capitol for the swearing-in ceremony. Most presidents ride to their inaugurations (in a carriage and then later a car) save for Thomas Jefferson and Andrew Jackson, who walked.

Monday marked a significant step toward the Inauguration Day of President-elect Donald Trump, as his victory was certified by the United States Congress.