It is the 172nd day of the year with only 193 days remaining until the end of the year.
On non-leap years, this day marks the summer solstice in the northern hemisphere and the winter solstice in the southern hemisphere. It is the day of the year with the most hours of daylight in the northern hemisphere, and the least hours of daylight in the southern hemisphere.
1788 - New Hampshire ratifies the Constitution and is admitted as the 9th state in the United States.
1854 - The first Victoria Cross is awarded during the bombardment of Bomarsund in the Aland Islands.
1877 - The Molly Maguires, ten Irish immigrants convicted of murder, are hanged at the Schuylkill County and Carbon County, Pennsylvania prisons.
1900 - China formally declared war on the United States, Britain, Germany, France, and Japan, as an edict issued from the Dowager Empress Cixi.
1919 - Admiral Ludwig von Reuter scuttles the German fleet in Scapa Flow, Orkney. The nine sailors killed are the last casualties of the War to End All Wars.
1948 - Columbia Records introduces the long-playing record album in a public demonstration at the Waldorf-Astoria Hotel in New York, New York.
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.