Article Detail International custom day Answer: 26 January Similar Questions : 1. World Deaf Day Answer: 26 September 2. World Haemophilia Day Answer: 17 April 3. Ordnance Factories Day Answer: 18th March 4. World Anti-tobacco Day Answer: 31 May 5. World Diabetes Day Answer: 27th June 6. World Non Veg Prevention Day Answer: 25 November 7. World Ozone Day Answer: 16 September Read more from - Important Days of Year