News18. Also known as the Diwali of Gods, this sacred festival commemorates Lord Shiva’s victory over the demon Tripurasara. As per Hindu mythology, the gods celebrated this divine victory by. Dev Deepawali 2026 is celebrated on Kartik Purnima, marking the Festival of Lights for the Gods. Know the Dev Diwali date, muhurat, rituals, significance and why Varanasi glows.