2025 Calendar International Days. International day for the prevention of and fight against all forms of transnational organized crime (a/res/78/267) This page contains a calendar of all 2025 observances instituted by the united nations and its agencies, and recognised in countries across the world.

While the list of dates is not. International day for preventing the exploitation of the environment in war and armed conflict awareness & cause , nature & environment , united nations monday , nov 10