Whose birth anniversary on August 20 is commemorated as Sadbhavana Diwas (harmony day)?

Every year on August 20, Sadbhavana Diwas (harmony day) is celebrated commemorating the birth anniversary of former Prime Minister (PM) Rajiv Gandhi. This day is observed to encourage the national integration, peace, affection and communal harmony among the Indian people of all religions. 2019 commemorates the 75th birth anniversary of Rajiv Gandhi. Senior leaders paid tribute to him at a prayer meeting organized at "Veer Bhumi", a memorial of Rajiv Gandhi in New Delhi.