National Unity Day is observed on October 31st in India to commemorate the birth anniversary of Sardar Vallabhbhai Patel, who played a key role in unifying numerous princely states after independence. Events include administering a pledge of unity in schools, a 'Run for Unity' involving people from all sections of society, and an evening march past by police. Navratri is a nine-day Hindu festival celebrated differently in various parts of India but generally involving prayers, fasting and rituals dedicated to the goddess Durga. Celebrations include religious ceremonies, dance, drama, and community feasts.