City Day 2026 is a one-day academic and professional event organized by the Department of Regional Economics and Geography, RUDN University. Held on 29 October 2026, it brings together faculty, students, alumni, and industry practitioners to discuss how cities change and what makes them competitive. The programme opens with a welcome address and includes a master class on a unified navigation environment for urban transport, covering standards, technologies, and change management. A creative cities quest and contests add interactive formats, while a presentation on the research expedition to Meshchovsk reflects on field-based learning. Second master class examines the aerotropolis as a new growth point for commercial real estate, moving from a transit hub to an investment core. The event concludes with a session on final qualification works, from idea to project, featuring 2026 graduates. Overall, City Day combines research, professional insight, and student engagement to explore urban mobility, creativity, and investment.