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August 6th 1947
Hiroshima Peace Memorial Ceremony
Every August 6, "A-Bomb Day", the city of Hiroshima holds the Peace Memorial Ceremony to console the victims of the atomic bombs and to pray for the realization of lasting world peace. The ceremony is held in front of the Memorial Cenotaph in Hiroshima Peace Memorial Park. Participants include the families of the deceased and people from all over the world. The first ceremony was held in 1947 by the then Hiroshima Mayor Shinzo Hamai.
https://en.m.wikipedia.org/wiki/Hiroshima_Peace_Memorial_Ceremony