Because they have to be sworn in . same with the vice president.
No
Jefferson was the first to be inaugurated in Washington, DC. Presidents Washington and Adams were duly inaugurated when they took office but the capital was not yet in DC.
Yes, they are sworn in, on the day they take office.
44
Presidents are inaugurated at the beginning of each term. Cleveland was president for two terms, so he was inaugurated twice, as were (for example) George W. Bush and William J. Clinton. Cleveland is unique among US Presidents in that his two terms of office were not consecutive. However, he would have been inaugurated twice even if they had been.
Five presidents never gave an address: Tyler, Fillmore, Andrew Johnson, Arthur, and Ford
American presidents who are re-elected are required to repeat the oath of office.
Five of them were 51, and five of them were 54.
Each US President were different ages when they were inaugurated. But the average age during Inauguration is 54 years old.
Until Franklin Roosevelt's second term, all of the presidents were inaugurated on March 4. Since then, if January 20 falls on Sunday, the big inauguration ceremony is held the next day.
All were inaugurated at the same exact place Trump was this week. It has been traditionally done in front of the capital building.
...I will preserve, protect and defend the Constitution of the United States...