About 1,500 people gathered at the Pandit Deendayal Upadhyaya Institute of Archaeology in Greater Noida for Deepotsav, a two-day Diwali event led by philosopher-author Acharya Prashant. Organisers said over 100,000 joined online. Activities included a book launch, an exhibition on his life, and a main session on Bhagavad Gita 7:28, with reflections continuing into Sunday.