On 8 December 2005, the General Assembly declared that 4 April of each year shall be observed as the International Day for Mine Awareness and Assistance in Mine Action. Resolution adopted by the General Assembly on 8 December 2005, (A/60/473).
It called for continued efforts by States, with the assistance of the United Nations and relevant organizations, to foster the establishment and development of national mine-action capacities in countries where mines and explosive remnants of war constitute a serious threat to the safety, health and lives of the civilian population, or an impediment to social and economic development at the national and local levels.
Source: un.org