Maa Kalaratri is the seventh manifestation of Goddess Durga, worshipped on Saptami. If Mahagauri is the moon's serene light, Kalaratri is the void of the dark moon night. Her vibration is the most fierce, intense, and protective. She is the "Death of Time" (Kaal = Time/Death, Ratri = Night), representing the energy that destroys ignorance and darkness to make way for light.