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5- September-1967	Central Hindi Committee constituted under the chairmanship of the Prime Minister.
11- September-1967	China and India exchange artillery fire on Sikkim-Tibet border.
16- September-1967	Tibetan, Indian and Chinese troops engage in fighting at Natu La pass on the Tibet-Sikkim border.
18- September-1967	English was adopted the official language of Nagaland .