Article Detail International custom day Answer: 26 January Similar Questions : 1. World Homeopathy Day Answer: 10 April 2. World Asthma Day Answer: 3rd May 3. Central Excise Day Answer: 24 February 4. World Environment Protection Day Answer: 26 November 5. World Laughter Day Answer: 10th January 6. World Book and Copyright Day Answer: 23 April 7. World Thrift Day Answer: 30 October Read more from - Important Days of Year