In which month, Hiroshima Day is observed across the world?

Explanation

August. Hiroshima Day is observed on 6 August (Little Boy) to commemorate the atomic bombing of Hiroshima Japan in the year 1945 and 9 August (Fat Man) of Nagasaki, at the end of World War II (1939 - 1945). World War I - 1914 to 1918. The atomic bomb is based on the principle of nuclear fission.