World Meteorological Day was established in 1951 to commemorate the World Meteorological Organization creation on 23th March 1950. This organization announces a slogan for World Meteorological Day every year, and this day is celebrated in all member countries.
The World Meteorological Organisation (WMO), an organization of the United Nations, was created on 23th March 1950 to replace the International Meteorological Organization. It began operations in 1951 to coordinate member nation in the fields of meteorology, operational hydrology, and Earth sciences for the security of their population. The first World Meteorological Day was held on 23th March 1961.