The US President initially took office in March, but the date is changed to January to shorten the time to hand over power to the new administration.

On January 20, Joe Biden will become the 46th president of the United States, but he is only the 15th president to be sworn in on this day.

Previously, the presidents elected America was sworn into office on March 4, since the second inauguration of George Washington in 1793 (Washington took office for the first time on April 30, 1789).

This regulation was born at a time when the United States was an agricultural society, the population was dispersed, the traffic was divided and the means of communication were not developed.

However, the advent of modern technology quickly shortened the time doing these jobs.

So 4 months of "lame duck" (the term for officials at the end of a term, when a successor has been chosen) has become unnecessary and also has a negative impact.

So lawmakers pushed for change and passed the 20th Amendment, which set the official inauguration day at January 20.

If January 20 falls on a Sunday, a separate and simple inauguration ceremony will be held at the White House.

Since the approval of the 20th Amendment, this has happened with three presidents: Dwight Eisenhower in 1957, Ronald Reagan in 1985, and Barack Obama in 2013. The dual inauguration was undertaken to ensure a