3. Since 1937, it has taken place at noon EST on the first day of
the new term, some 72 to 78 days after the presidential election, except
for three occasions when that date fell on a Sunday. *
January 21st
November 3rd
January 20th

The inauguration of the president of the United States is explained below in details.

Explanation:

The inauguration of the president of the United States is a convention to indicate the initiation of a new four-year duration of the president of the United States. The inauguration takes station for each fresh presidential session, even if the president is remaining in position for a second session. Since 1938, it has taken a position at noon EST on 20 January, the inaugural day of the new course, some 72 to 78 workdays after the presidential polls, except for three events when 20 January came on a Sunday.

pennsylvania, new hampshire, massachusetts, connecticut and rhode island .