On 4 December 2000, the General Assembly noted that 2001 marked the fiftieth anniversary of the 1951 Convention relating to the Status of Refugees, and that the Organization of African Unity (OAU) had agreed to have International Refugee Day coincide with Africa Refugee Day on 20 June. It, therefore, decided that, as from 2001, 20 June would be celebrated as World Refugee Day (resolution 55/76).
Source: United Nations Website: Observations