Bihar was 1st state to make Hindi an official language
Bihar replaced Urdu with Hindi as its sole official language in 1881, becoming the first state in India to adopt the language. Following this, Hindi also became the official language of other states, including Uttar Pradesh, Haryana, and Rajasthan. Hindi was adopted as the official language of India on September 14, 1949, and the day is celebrated as Hindi Divas.