World Cities Day, celebrated every year on October 31, highlights the importance of sustainable urban development and the role of cities in driving progress and innovation. Established by the United Nations in 2014, the day promotes cooperation among countries to address urban challenges such as pollution, housing, climate change, and inequality. It encourages cities to become more inclusive, resilient, and environmentally friendly, ensuring that urban growth benefits everyone. Each year focuses on a specific theme—emphasizing how well-planned, sustainable cities can improve quality of life and support global efforts toward achieving the UN’s Sustainable Development Goals (SDGs).