World Days or International Days to Highlight Challenges

This knol was started on  World Environment Day. All the news papers that I glanced across on that day in the morning had news items related to Environment. Some time back, Mr. Andreas Kemper, one of knol co-authors informed us about World Social Justice Day. As knol authors, We need to be aware of these days, remember them and create knols to contribute to facilitate the achievement of the objectives of celebrating such days all over the world. The days declared as world days or international days by United Nations or its constituent bodies are available on its web site. They are given below. Any knols written on these days can be inserted in knol subdirectory of world days (World Days).  Visitors can give any detail as a comment.