The first phase, called the House Listing and Housing Census was conducted between April and September, 2010 across the country. The second phase, Population Enumeration, was conducted from February 9, 2011 up to February 28, 2011, with Revisional Round during 1st to 5th March, 2011. In snow bound areas, the Population Enumeration was conducted from September 11 to 30, 2010. The Final Population data was released on April 30, 2013.
Source: India Book 2020 - A Reference Annual