- Hindi Diwas is observed on 14 September to mark the Constituent Assembly’s 1949 decision regarding Hindi in the Devanagari script.
- 14 September 2026 marks the 77th anniversary of this decision.
- The day is also associated with the birth anniversary of Beohar Rajendra Simha.
- The 6th All India Official Language Conference was held in Mumbai as part of the 2026 observance.