Bhoot Chaturdashi, observed in Bengal on the 14th lunar day of Kartik before Kali Puja, features rituals honoring ancestral spirits. Households light 14 earthen lamps and prepare 'Choddo Shaak', a dish of 14 leafy greens. These customs guide returning ancestors, ward off harmful spirits, and connect families to generational memory ahead of Kali Puja.