Article Detail International Mother Language Day Answer: 21 February Similar Questions : 1. World Ozone Day Answer: 16 September 2. Indian Civil Service Day Answer: 21 April 3. World Student's Day Answer: 17 November 4. Worldtheatre Day Answer: 27 March 5. Anti Terrorism Day Answer: 21st May 6. International Women's Day Answer: 8th March 7. World Standards Day Answer: 14 October Read more from - Important Days of Year