National Unity Day (Hindi: राष्ट्रीय एकता दिवस, romanized: Rāshtrīya Ektā Divas) is celebrated in India on 31 October.

The day is celebrated to mark the birth anniversary of Vallabhbhai Patel who had a major role in the political integration of India.

"[3] On the day, a pledge is read out in government offices:[1] I solemnly pledge that I dedicate myself to preserving the unity, integrity, and security of the nation and also strive hard to spread this message among my fellow countrymen.

I take this pledge in the spirit of the unification of my country which was made possible by the vision and actions of Sardar Vallabhbhai Patel.

I also solemnly resolve to make my own contribution to ensure the internal security of my country.