An inauguration is the act of swearing an elected person into office. Inauguration Day is the day that the most important elected official in the United States, the president, takes office. Readers will learn about the history of Inauguration Day in the United States, key aspects of this important day, and how Inauguration Day has changed since 1789, when George Washington took office. Full-color photographs and primary sources help readers understand the importance and ceremony of Inauguration Day.