From Hindupedia, the Hindu Encyclopedia
By Swami Harshananda
Caṇḍikāvrata literally means ‘vow associated with Caṇḍikā’.
It is a religious vow undertaken on the 8th and 9th days of each fortnight (both dark and bright). On these days the goddess Caṇḍikā is to be worshiped. Fasting is a necessary discipline. The vrata is spread over one year. It helps the worshiper to get Mother Caṇḍikā’s grace and fulfill his desires.
- The Concise Encyclopedia of Hinduism, Swami Harshananda, Ram Krishna Math, Bangalore