From 1789 until 1933, the day on which the newly elected president of the United States began his term of office was March 4. The day was changed to January 20 when the 20th Amendment to the Constitution was passed in 1933. At noontime, the chief justice of the United States Supreme Court administers the oath of office to the president, who then delivers an Inaugural Address. This is followed by a colorful Inauguration Parade through the streets of Washington, D.C. Discuss
Source: The Free Dictionary