Nagasaki Day is observed on August 9 every year in view of US dropping an atomic bomb on the Nagasaki city of Japan in 1945 during World War II. While the first bomb was dropped on the city of Hiroshima, the second was dropped on Nagasaki. The Nagasaki blast killed around 74000 people or more. The blast caused a lot of devastation in Japan and because of this, Japan also surrendered in World War II.

The US dropped this bomb on Japan as it would end the war quickly and hardly any lives would be affected in the US. According to Jagran Josh, the bomb was a uranium one. The bomb which was dropped on Hiroshima had an explosive yield of 15000 tonnes of TNT. The bomb which was dropped on Nagasaki was a slightly larger plutonium bomb and killed around 74000 people.