June 21 is the 172nd day of the year. There are 193 days remaining until the end of the year. This date is slightly more likely to fall on a Tuesday, Thursday or Sunday (58 in 400 years each) than on Friday or Saturday (57), and slightly less likely to occur on a Monday or Wednesday (56).
+ 1788 – New Hampshire ratifies the Constitution of the United States and is admitted as the ninth state in the United States.
+ 1864 – American Civil War: The Battle of Jerusalem Plank Road begins.
+ 1898 – The United States captures Guam from Spain.
+ 1964 – Three civil rights workers, Andrew Goodman, James Chaney and Mickey Schwerner, are murdered in Neshoba County, Mississippi, United States, by members of the Ku Klux Klan.
+ 1982 – John Hinckley is found not guilty by reason of insanity for the attempted assassination of U.S. President Ronald Reagan.
+ 2004 – SpaceShipOne becomes the first privately funded spaceplane to achieve spaceflight.
( Births )
+ 1921 – Jane Russell, American actress and singer (d. 2011)