Sandhya Puja is a unique ritual held at the conjunction of Ashtami and Navami Tithis during Durga Puja. In 2012, date of Sandhi Puja is between October 22 and October 23. The time in North India is at 12:28 AM (midnight) on October 23. After usual rituals, the priest propitiates Goddess Chamunda.
The popular belief is that Goddess Chamunda killed Chanda and Munda at this period. Chanda and Munda were appointed by Mahisha to attack Goddess Durga. Goddess Chamunda appeared from the forehead of Goddess Durga and they killed Chanda and Munda.
The traditional ritual of Sandhi Puja consists of lighting 108 lamps. Flowers, leaves, clothes and jewelry are offered to Goddess Chamunda during the period.