National Hindi Diwas observed on 14th September every year
Hindi Divas (or Hindi day) is an annual day that is observed every year on 14 September all over India since 1953, to celebrate the popularity of Hindi as an official language of India. Although the Hindi Day is mostly observed by the Government of India, many private organizations and voluntary groups also celebrate the day.
Hindi is the fourth most spoken language in the world. As per the latest figures, 43.63% of people in India currently speak the Hindi language. Section 343 (1) of the Constitution of India, in reference to Hindi as the official language, reads- The official language of Union shall be Hindi and script Devanagari. The form of the marks used for official purposes of the Union will be international form.