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
Confirmations of Barack Obama's Cabinet by the Energy and Natural Resources Committee. Nobel Prize–winning scientist Steven Chu was unanimously confirmed by the U.S. Senate on January 20, 2009. On January 21, 2009, Chu was sworn in as Secretary of Energy in the Barack Obama administration. Chu is the first person appointed to the Cabinet after having won a Nobel Prize. He is also the second Chinese American to be a member of the Cabinet after Elaine Chao. On February 1, 2013, Secretary Chu announced his resignation pending the confirmation of a successor. On March 4, 2013 President Obama announced he was nominating Ernest Moniz as