11/22- President John F. Kennedy is assassinated
12/7- Pearl Harbor bombed, Delaware becomes the first state to ratify the Constitution
12/10- First paper currency is issued in the Colonies, General William T. Sherman completes March to the Sea
12/12- Pennsylvania ratifies the Constitution (2nd State)
1/20- Iran Hostage Crisis ends, Trump, JFK, Reagan inaugurated
3/1- The Articles of Confederation are ratified after nearly four years,
3/4- Government under the U.S. Constitution begins
Not all have been inaugurated on 1/20, only started happening recently within the United States.
4/30/1789 : George Washington
3/4/1797 : John Adams
3/4/1801 : Thomas Jefferson
3/4/1809 : James Madison
3/4/1817 : James Monroe
3/4/1825 : John Quincy Adams
3/4/1829 : Andrew Jackson
3/4/1837 : Martin Van Buren
3/4/1841 : William Henry Harrison
4/4/1841 : John Tyler
3/4/1845 : James K. Polk
3/4/1849 : Zachary Taylor
7/9/1850 : Millard Fillmore
3/4/1853 : Franklin Pierce
3/4/1857 : James Buchanan
3/4/1861 : Abraham Lincoln
4/15/1865 : Andrew Johnson
3/4/1869 : Ulysses S. Grant
3/4/1877 : Rutherford B. Hayes
3/4/1881 : James A. Garfield
9/19/1881 : Chester A. Arthur
3/4/1885 : Grover Cleveland
3/4/1889 : Benjamin Harrison
3/4/1893 : Grover Cleveland
3/4/1897 : William McKinley
9/14/1901 : Theodore Roosevelt
3/4/1909 : William Howard Taft
3/4/1913 : Woodrow Wilson
3/4/1921 : Warren G. Harding
8/2/1923 : Calvin Coolidge
3/4/1929 : Herbert Hoover
3/4/1933 : Franklin D. Roosevelt
4/12/1945 : Harry S. Truman
1/20/1953 : Dwight D. Eisenhower
1/20/1961 : John F. Kennedy
11/22/1963 : Lyndon B. Johnson
1/20/1969 : Richard Nixon
8/9/1974 : Gerald Ford
1/20/1977 : Jimmy Carter
1/20/1981 : Ronald Regan
1/20/1989 : George H. W. Bush
1/20/1993 : Bill Clinton
1/20/2001 : George W. Bush
1/20/2009 : Barack Obama
1/20/2017 : Donald J. Trump
1/20/2021 : Joe Biden