Each year the International Day of Peace is observed around the world on 21 September. The UN General Assembly has declared this as a day devoted to strengthening the ideals of peace, through observing 24 hours of non-violence and cease - fire.
International Mountain Day is celebrated annually on 11 December to to create awareness about the importance of mountains to life, to highlight the opportunities and constraints in mountain development, and to build alliances that will bring positive change to mountain peoples and environments around the world.
When is International Human Solidarity Day observed?
The International Human Solidarity Day (IHSD), observed on 20 December, is an international annual unity day of the United Nations and its member states introduced by the general assembly during the 2005 World Summit.