 In the state of West Bengal the day before the Kali Puja is observed as Bhoot Chaturdashi.The veil between the two worlds is thin and it is believed on the eve of this dark night the souls of the deceased come down to earth to visit their dear ones.It is also believed that the 14 forefathers of a family visit their living relatives and so 14 Diyas are placed all around the house, to guide them homewards and especially to chase away the evil ones.