April 10 - The legislature for Sikkim, located in the Himalayan Mountains, voted to abolish the monarchy and to make the nation one of the states of India.
April 14 - Voters in Sikkim overwhelmingly approved abolishing that nation's monarchy and merging with neighboring India. The final result was 59,637 in favor and only 1,496 against.
May
May 16 - Sikkim became the 22nd state of India and its 200,000 residents became citizens, as Indian President Fakhruddin Ali Ahmed signed an order ratifying an amendment to the nation's constitution. Sikkimese voters had overwhelmingly approved annexation on April 14 and India's Parliament had approved statehood the same month.