George Washington
At the end of his second term, Washington retired for personal and political reasons, fatigued and disgusted with personal attacks, and to assure a truly contested presidential election could be held. He did not feel bound to a two-term limit, but his retirement ultimately set precedent. The two-term limit to the presidency was formalized with the 1951 adoption of the Twenty-second Amendment to the United States Constitution. Washington is often credited with setting the principal of a two-term presidency, but it was Thomas Jefferson who first refused to run for a third term on political grounds.
Second inauguration of Barack Obama
Since 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 January 20 in the Blue Room at the White House. Associate Justice Sonia Sotomayor administered the oath to the Vice President on the same date at Number One Observatory Circle, the official residence of the Vice President. While reciting his oath, Biden's hand rested upon a Bible that had been in his family since 1893 and which he had used in every swearing-in ceremony since entering the U.S. Senate in 1973. Obama used a Bible owned by the family of First Lady Michelle Obama when he took his oath of office.