January 20th
The 20th Amendment to the U.S. Constitution specifies the date that the President and Congress take office.
Franklin Roosevelt was the first president to take office on the inaugural date specified by the Twentieth Amendment.
January 20 is the date the president is sworn in.
generally, the third Monday in January following the election
Franklin Roosevelt( second term) was the first president to be inaugurated on the new date of Jan. 20
Oath of Office
The president will take office in June of the following year.
January 20, 2009 was the date.
Joe Biden holds this office at this date in 2011.
The vice president would take office because the constitution states that if the president dies or resigns during his term in office the vice president serves the rest of the term
All US presidents take the oath of office, starting with the first president, George Washington.
The new President will take oath for the office January 20th 2017. At this time President Barack Obama will no longer be President.