When is National Unity Day celebrated?

National Unity Day (also called Rashtriya Ekta Diwas) is celebrated every year on 31 October to mark the birth anniversary of Sardar Vallabhbhai Patel, India’s first Deputy Prime Minister and Home Minister.
He is known as the “Iron Man of India” for his key role in uniting more than 560 princely states into a single nation after independence. The day promotes the message of national integration, unity, and integrity.