The idea of celebrating Teachers' Day took ground independently in many countries during the 20th century; in most cases, they celebrate a local educator or an important milestone in education (for example, Argentina commemorates Domingo Faustino Sarmiento's death on September 11 since 1915,while India celebrates Dr. Sarvepalli Radhakrishnan's birthday on September 5 since 1962). These two factors explain why almost all countries celebrate this day on different dates, unlike many other International Days.
