Inauguration is the process of swearing a person into office and thus making that person the incumbent, which commonly occurs through a formal ceremony or special event. The word inauguration stems from the Latin augur, which refers to the rituals of ancient Roman priests seeking to interpret if it was the will of the gods for a public official to be deemed worthy to assume office. In the United States, the presidential inauguration is the day when the president-elect and vice-president-elect are sworn in and take office, which occurs every four years on January 20 (or January 21 if January 20 falls on a Sunday) . The inauguration ceremony takes place at the U.S. Capitol building in Washington, DC, and the president-elect recites the presidential oath of office, which is "I do solemnly swear (or affirm) that I will faithfully execute the Office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States". The inaugurations of public figures, especially those of political leaders, often feature lavish ceremonies in which the figure publicly takes their oath of office (sometimes called "swearing in"), often in front of a large crowd of spectators.