World Hindi Day is observed annually on January 10 to celebrate and promote the Hindi language globally. The day acknowledges Hindi's widespread use beyond India, its cultural significance, and its role in international communication, education, and diplomacy. It commemorates the first World Hindi Conference in 1975 and was first officially observed in 2006. World Hindi Day differs from India's National Hindi Diwas on September 14, which focuses on the language's adoption within India.