Kartika Poornima (Kartika purnima) is a Hindu, Jain and Sikh holy festival, celebrated on the Purnima (full moon) day or the fifteenth lunar day of Kartika (November–December). It is also known as Tripuri Poornima and Tripurari Poornima. It is sometimes called Deva-Diwali or Deva-Deepawali - the festival of lights of the gods.