Article Detail Earth Day Answer: 22 April Similar Questions : 1. Engineer's Day Answer: 15 September 2. Hiroshima Day Answer: 6th August 3. National Science Day Answer: 28 February 4. International Human Rights Day Answer: 10 December 5. World Ozone Day Answer: 16 September 6. International Family Day Answer: 15 May 7. International Day for the Elderly Answer: 1 October Read more from - Important Days of Year