Second inauguration of Barack Obama 1937, the 4-year term of the President and Vice President have ended and begun at noon on January 20, as prescribed by the Twentieth Amendment to the United States Constitution. Because January 20, 2013, fell on a Sunday, both Obama and Biden were officially sworn in privately, and then again the following day in a public ceremony. This was the seventh time since the start of James Monroe's second term in office, in 1821, that the oath of office was officially administered in a Sunday private ceremony. Chief Justice John Roberts administered the oath of office to the President on
Oath of office of the Vice President of the United States office of President of the Senate. Up until the middle of the 20th Century, the Vice President-Elect nearly always would be sworn in by the highest-ranking officer of the US Senate which was the outgoing vice president or the President Pro Tempore of the United States Senate. Sometimes, although not always, a short address would be given by the new vice president to the Senate. The oath of office has been administered most by the President Pro Tempore of the United States Senate (last in 1925) for a total of 20 times. Others to give the oath of office include