<P> Rashtriya Ekta Diwas ( National Unity Day ) was introduced by the Government of India and inaugurated by Indian Prime Minister Narendra Modi in 2014 . The intent is to pay tribute to Patel , who was instrumental in keeping India united . It is to be celebrated on 31 October every year as annual commemoration of the birthday of the Iron Man of India Sardar Vallabhbhai Patel , one of the founding leaders of Republic of India . The official statement for Rashtriya Ekta Diwas by the Home Ministry of India cites that the National Unity Day `` will provide an opportunity to re-affirm the inherent strength and resilience of our nation to withstand the actual and potential threats to the unity , integrity and security of our country . '' </P>
who is the national leader who is called the iron man of india
Sardar Vallabhbhai Patel