A mother and her daughter enjoying Dev Diwali. The Dev Diwali is the festival of Kartik Poornima celebrated in Varanasi, Uttar Pradesh, India. All the ghats(river bank) on the riverfront of the Ganges in Varanasi from end to end, that is from Ravidas Ghat to Rajghat are lit with thousands of diyas in honour of Ganges, as the gods are believed to descend on earth to bathe in the holy river on this day.