Their terms begin on Jan. 3rd of odd-numbered years.
The President is customarily sworn into office on the steps of the US Capitol building.
They ONLY have to be sworn in to qualify
Lyndon Johnson was sworn in office on Air Force One, but I do not know of any presidents sworn in out of the U.S.
The president is sworn in on January 20 of the year following the election.
John Boehner was officially sworn in as the Speaker of the House on January 5, 2011.
Barack Obama was sworn in as the 44th US President.
Inauguration Day, January 20, 2009 is when he left the White House and Barack Obama was sworn in as President of the US.
January 20th
Rutherford B. Hayes was secretly sworn in a day (March 3) before his official inauguration. He was secretly sworn in because of the tension surrounding his election. He was sworn in the Red Room of the White House.
January
I dont know how long after the election, but he has to be sworn in by noon on the day of inauguration.
George Washington was 57 when sworn in as US President on April 30, 1789.