Hindi Diwas is observed on September 14 every year. Hindi ranks as the world's fourth most-spoken language, following English, Spanish, and Mandarin. It's widely spoken in North India as a mother tongue.

• On Hindi Diwas, the President of India presents Rajbhasha awards to individuals for their contributions to the language at a ceremony in Delhi. 
• Hindi Diwas aims to promote and propagate this official language while serving as a patriotic reminder of India's shared roots and unity among its diverse population.
• On September 14, 1949, the Constituent Assembly of India adopted Hindi as the official language of the newly formed nation.
• This decision was later incorporated into the Indian constitution on January 26, 1950.
• The first Hindi Diwas was celebrated on September 14 in 1953.