Every year on 31 October, the world observes World Cities Day, which was first established by the United Nations (UN) in 2014. This year’s theme, “City Renewal: Affordable Housing for All,” highlights how modern cities can respond to challenges related to housing affordability, ageing infrastructure, climate change, and social inequalities. The main programme for this year’s edition will be hosted in Fuzhou, China, where city representatives, experts, and organizations from around the world will discuss the future of sustainable urban development.