When did the Indian city of Calcutta change to its present name?

Kolkata, (also known as Calcutta, the official name until 2001) is the capital of the Indian state of West Bengal. Although the city's name has always been pronounced Kolkata or Kôlikata in Bengali, the anglicised form Calcutta was the official name until 2001, when it was changed to Kolkata in order to match Bengali pronunciation. (It should be noted that "Calcutt" is an etymologically unrelated place name found at several locations in England.)

Kolkata is located on the east bank of the Hooghly River, it is the principal commercial, cultural, and educational centre of East India, while the Port of Kolkata is India's oldest operating port and its sole major riverine port. The city is widely regarded as the "cultural capital" of India, and is also nicknamed the "City of Joy".