The Karnataka government has decided to observe September 15 as which day?

The Government of Karnataka has decided to observe September 15 as the official 'Engineers' Day' and to permit engineers to use the prefix 'Er.' before their names; this day is celebrated on the birth anniversary of Bharat Ratna Sir M. Visvesvaraya. As the Diwan of Mysore (1912–1918), Visvesvaraya made significant contributions to irrigation, flood control, and industrial development, and was associated with the KRS Dam; he was awarded the Bharat Ratna in 1955.