Article Detail World Anti-tobacco Day Answer: 31 May Similar Questions : 1. World Ozone Day Answer: 16 September 2. World Animal Welfare Day Answer: 4 October 3. World Book and Copyright Day Answer: 23 April 4. World Adult Day Answer: 18 November 5. World AIDS Day Answer: 1 December 6. National Maritime Day Answer: 5 April 7. Ordnance Factories Day Answer: 18th March Read more from - Important Days of Year