Explanation:

 The festival famous as ‘Budhi or Andheri Diwali (dark festival of lights)’ falls every year on first ‘amavasya’ (moonless night in Hindu calendar) that is just one month after Diwali.

It is celebrated in Ani and Nirmand areas of Kullu district, Shillai, Sangrah and Rajgarh of Sirmaur and Chopal of Shimla district. In Kullu district, it is celebrated to commemorate the killing of demons Dano and Asur, who resided there in the form of snakes.