Port Blair, Aug 20: Sadhbhavana Diwas, the Birth Anniversary of Late Prime Minister Rajiv Gandhi was observed today in a solemn ceremony organized at Subhash Gram Panchayat, Diglipur. Floral tributes were paid to the late Prime Minister. On the occasion oath of Sadhbhavana Diwas was administered to all those present at the venue. The people present took oath to promote National Integration and Communal Harmony among all people irrespective of caste, creed, religion and language and to promote goodwill and non-violence.