Sep 4, 2015

Q.1800

At the UN Headquarters in New York a commemorative plaque was dedicated at the Tree of Peace and Unity. This tree (a weeping cherry) was planted on May 8th 2015 to mark the 70th anniversary of an historic day. And the plaque was added on September 2, 2015 which is the 70th anniversary of another special day.


Give the significance of these days.

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