Navaratri: Hindu Festival to the Mother Goddess
In 2014, Navaratri starts on September 25 and lasts until October 3. Navaratri is the Hindu festival of nine nights dedicated to the glorification of Shakti, the feminine form of the Divine. The first three nights are dedicated to the goddess of action and energy. Her different manifestations -- Kumari, Parvati and Kali are worshiped during these days.
During Navaratri, we invoke the energy aspect of God in the form of the universal mother, commonly referred to as " Durga ," which literally means the remover of miseries of life. She is also referred to as "Devi" (goddess) or "Shakti" (energy or power). It is this energy, which helps God to proceed with the work of creation, preservation and destruction. In other words, you can say that God is motionless, absolutely changeless, and the Divine Mother Durga, does everything. Truly speaking, our worship of Shakti re-confirms the scientific theory that energy is imperishable. It cannot be created or destroyed. It is always there. (From "Navaratri: The 9 Divine Nights" at http://hinduism.about.com/od/festivalsholidays/a/navaratri.htm)