By law, the President must take his Oath of Office before noon on January 20. But since the 20th fell on a Sunday this year, there was a private ceremony on that date, followed by the public ceremony held on Monday, Jan. 21. A week of festivities includes the Presidential Swearing in Ceremony, Inaugural Address, Inaugural Parade and a night of Inaugural Balls and galas honoring the elected President of the United States.