Why is National Unity Day Celebrated on October 31? History, Significance, Quotes and Messages

National Unity Day 2023: Sardar Vallabhbhai Patel is renowned as the ‘Iron Man of India’ for his significant role in uniting more than 550 princely states.National Unity Day 2023: Sardar Vallabhbhai Patel is renowned as the ‘Iron Man of India’ for his significant role in uniting more than 550 princely states.