Karnataka Rajyotsava, also known as Karnataka State Day, is a public holiday celebrated annually on 1 November in the Indian state of Karnataka. It commemorates the merger in 1956 of the Kannada-speaking regions of southwestern India under the State’s Reorganisation Act to form the state.
On 1 November 1956, Mysore state, comprising most of the area of the erstwhile princely state of Mysore, was merged with the Kannada-speaking areas of the Bombay and Madras presidencies, as also of the principality of Hyderabad, to create a unified Kannada-speaking sub-national entity.
