The International Day of Clean Air for Blue Skies was observed on 7 September 2026 to build awareness and encourage action for better air quality. The theme for 2026 is "Clean Air, Healthy Choices: Acting Together for People and Planet." The same date also marked the International Day of Police Cooperation, which highlights cooperation among police and law-enforcement agencies across countries; its 2026 theme is "Protecting against Vulnerability - Building Trust and Legitimacy in Policing."