site.btaObservances: August 6

The world:

Hiroshima Day. World Day for the Prohibition of Nuclear Weapons;
National Day of Bolivia: Independence Day (1825);
National Day of Jamaica: Independence Day (1962).

On this date in Bulgarian history:

1915: Bulgarian graphic artist Stefan Kanchev is born (dies August 22, 2001). In 1994 he is recognized as one of world's ten best masters of logos by International Trademark Centre in Ostend, Belgium.  

2007: Torrential rain swells Hlebarovska River, which floods town of Tsar Kaloyan (Northeastern Bulgaria). Precipitation totals 291 l/sq m in 24 hours, equal to country's semiannual average.

2007: It is announced that a team of astronomers at Lowell Observatory, Arizona, led by Bulgarian Georgi Mandushev, have discovered largest known planet in universe, dubbed TrES-4 (in constellation Hercules, 1.7 times size of Jupiter).