This year's Navratri begins on September 25th and will be celebrated until October 3rd. (Durga Puja celebrations are on September 29th.) During this festival of the nine nights, nine forms of the Mother Goddess Shakti/Devi are honored. Each region in India celebrates this festival according to their own tradition, but in some areas three days each are dedicated to Durga, Lakshmi and Sarasvati, respectively. This holiday culminates on the tenth day with the observance of Vijayadashami.
