Hindi Diwas is celebrated annually on September 14 to promote the Hindi language across India. Hindi is most widely spoken language in India and ranks third globally in terms of speakers.

• The day marks the adoption of Hindi as the official language by the Constituent Assembly in 1949.
• The origins of Hindi Diwas trace back to 1949 when India's Constituent Assembly chose Hindi as one of the official languages.
• This date also celebrates the birth anniversary of Beohar Rajendra Simha, a notable scholar and poet who championed making Hindi the official language.