Explanation

Hiroshima Day is observed on August 6 to commemorate the atomic bombing of Hiroshima, Japan, in 1945, at the end of World War II.

The bombings killed over 200,000 people in just seconds and injured thousands more

The Little Boy type of bomb, was dropped on the Japanese city of Hiroshima on 6 August 1945 

The Fat Man was dropped on Nagasaki, Japan, on August 9, 1945, at 11:01 AM.