World Cities Day was established in 2013 by the United Nations General Assembly. The first World Cities Day was held in October 2014. The theme for World Cities Day 201 is “Adapting Cities for Climate Resilience” reflecting the fact that climate change will have a huge impact on city residents with hundreds of millions of them experiencing floods, rising sea levels, storms and increasing periods of extreme temperatures. World Cities Day is expected to greatly promote the international community’s interest in global urbanization, push forward cooperation among countries in meeting opportunities addressing challenges of urbanization and contributing to sustainable urban development around the world.