August 7: Qi Xi in the Chinese lunar calendar (2008); Assyrian Martyrs Day; Independence Day in Côte d'Ivoire
- 1679 – Le Griffon, a brigantine by René-Robert de LaSalle, became the first sailing ship to navigate the Great Lakes.
- 1782 – The Badge of Military Merit (pictured), the original Purple Heart, was established as a military decoration in the Continental Army.
- 1933 – Many of an estimated 3,000 Assyrians were slaughtered by Iraqi troops during the Simele massacre in the Dahuk and Mosul districts.
- 1947 – An expedition led by Norwegian explorer Thor Heyerdahl on his raft the Kon-Tiki completed a 101–day journey across the Pacific Ocean.
- 1998 – Car bombs simultaneously exploded at the United States embassies in the East African capital cities of Dar es Salaam, Tanzania and Nairobi, Kenya, killing over 200 people and injuring over 4,500 others.