Starting in 1975, which was also International Women's Year, Mexico City hosted the World Conference on the International Women's Year, which resulted in the World Plan of Action and the designation of 1975-1985 as the United Nations Decade for Women. In 1980, another international conference on women was held in Copenhagen and the Convention on the Elimination of All Forms of Discrimination against Women was opened for signature. The third World Conference on Women was held in Nairobi, with the Committee on the Elimination of Discrimination against Women having begun its work in 1982.