On September 17th, 1787, the United States Constitution was adopted by the Constitutional Convention.

On September 16th, 1956, Play-Doh was introduced to the world.

On September 15th, 1835, Charles Darwin, aboard the HMS Beagle, reached the Galapagos Islands.

On September 14th, 1959, the Soviet probe Luna 2 crashed on the Moon, becoming the first man-made craft to land on it.

On September 13th, 122, the building of Hadrian's Wall began.

On September 12th, 1992, NASA launched the Space Shuttle Endeavour, marking the 50th space shuttle mission.

On September 11th, 1683, the Battle of Vienna took place.

On September 10th, 1913, the first paved coast-to-coast U.S. highway opened.

On September 9th, 1739, 1542, Mary Stuart was crowned "Queen of Scots" at the age of nine months.

On September 8th, 1971, the John F. Kennedy Center for the Performing Arts was inaugurated.

On September 7th, 1251 BC, the mythical hero Heracles is believe to have been born.

On September 6th, 1628, the Puritans settled Salem, Massachusetts.

On September 5th, 1793, the Reign of Terror was initiated to strike back against the French Revolution.

On September 4th, 1964, Scotland's Forth Road Bridge officially opened.

On September 3rd, 1976, the Viking 2 took the first close-up, color photographs of Mars.

On September 2nd, 1666, the Great Fire of London broke out and burned for three days.

On September 1st, 1974, the SR-71 Blackbird set the record for shortest flight from New York to London.

On August 31st, 1997, Diana, Princess of Wales, died in a car crash.

On August 30th, 1850, Honolulu, Hawai'i became an official city.

On August 29th, 1756, the Seven Years' War began.