Navratri is a festival of Hindu to pray to Goddess Durga, the embodiment of shakti, the feminine force that governs all cosmic creation, existence and change. This nine-night festival marks the beginning of autumn, celebrated in September or October, according to the Hindu calendar. Each of Navratri is dedicated to nine different forms of shakti or Goddess Durga. In West Bengal, the celebration of Navratri begins on the 6th day and concludes on the tenth day, known as Vijayadashami, the day of Durga's victory over evil. This six-day celebration is called Durgotsava and is the largest festival of the year for Bengali Hindus.