National Integration Day is celebrated in India on November 19 each year. This day aims to promote unity and harmony among the diverse cultures, religions, and languages that exist within the country. It encourages citizens to embrace their differences and work together for a common goal of national development. The day is observed in honor of Sardar Vallabhbhai Patel, a key figure in India's independence movement and the first Deputy Prime Minister. His efforts in unifying the various princely states into a single nation are commemorated, reminding people of the importance of solidarity and national pride.