Sikkim Statehood Day is celebrated on May 16, to commemorate the formation of Sikkim as the 22nd state of India Union, in 1975.

Sikkim was a protectorate of India from 1950 to 1975. In 1975, the Prime Minister of Sikkim appealed to the Indian Parliament for Sikkim to become a state of India. In April of that year, the Indian Army took over the city of Gangtok and disarmed the Chogyal's palace guards. In a special referendum held in May 1975, more than 97 percent of the electorate voted for the merger of Sikkim with India. Sikkim became the 22nd state of India on May 16, 1975.

Sikkim is a small state located in the northeastern Himalayas. It is bordered by Nepal to the west, Bhutan to the north, Tibet to the east, and West Bengal to the south. Sikkim is a popular tourist destination, known for its stunning scenery, including snow-capped mountains, lush valleys, and pristine lakes. The state is also home to a diverse range of cultures and languages.

Sikkim Statehood Day is a public holiday in Sikkim. It is a day to celebrate the state's rich history and culture, and to reaffirm its commitment to the Indian Union. On this day, people from all over Sikkim come together to celebrate their state's unique identity. There are parades, cultural performances, and other events held throughout the state. Sikkim Statehood Day is a time for Sikkimese people to come together and celebrate their state's proud history and bright future.