The Logic Society of Delhi invites you to the *World Logic Day 2025 Celebrations*. Join us for an exciting lineup of virtual talks, and an in-person meet-up on January 22. *Event Schedule*: January 15, 7:00 PM One Hundred Prisoners and a Light Bulb – and other Knowledge Puzzles Speaker: *Hans van Ditmarsch*, Senior Researcher, CNRS, France. Zoom Link: (https://upenn.zoom.us/j/94964030447) January 20, 7:30 PM Making Necessity Relevant Speaker: *Shawn Standefer,* Assistant Professor, National Taiwan University, Taiwan. Zoom Link: https://upenn.zoom.us/j/99219236470 January 21, 7:30 PM Generalised Geometric Logic and its Applications Speaker: *Purbita Jana*, Assistant Professor, Madras School of Economics, India. Zoom Link: https://upenn.zoom.us/j/97902248017 January 22, 7:00 PM Logic Society of Delhi Meet-up! Join us at Cafe Lota (National Crafts Museum & Hastkala Academy, New Delhi) to meet and network with logic enthusiasts from Delhi NCR. Talk abstracts and more details at: https://logic-society-delhi.github.io/logic-day-2025.html We look forward to seeing you at these events! Please help share the word. We would love to have attendance from across India and the world. You may direct your questions to logic.society.delhi(a)ashoka.edu.in.