Hindi Diwas: Hindi is one of the primary languages of the planet. Hence, World Hindi Day is observed every year on January 10th, whereas Hindi Day is observed every year on September 14th in India. September 14 is a day when even people who do not speak Hindi remember Hindi. This day is celebrated only to stop the growing trend of the English language and to stop ignoring Hindi in the country. Mahatma Gandhi had called Hindi the language of the people and asked to make it the national language of the country.