UN Days & Weeks

27International Day of Commemoration in memory of the victims of the Holocaust
20World Day of Social Justice (as of 2009)
21International Mother Language Day
8International Women's Day and 
United Nations Day for Women's Rights and International Peace
21International Day for the Elimination of Racial Discrimination
21-28Week of Solidarity with the Peoples Struggling against Racism and Racial Discrimination
22World Water Day
23World Meteorological Day
4International Day for Mine Awareness and Assistance in Mine Action
7World Health Day
23World Book and Copyright Day
3World Press Freedom Day
15International Day of Families
17World Information Society Day (formerly World Telecommunication Day)
21World Day for Cultural Diversity for Dialogue and Development
22International Day for Biological Diversity (formerly December 29, changed in 2001)
25-June 1Week of Solidarity with the Peoples of Non-Self-Governing Territories
29International Day of United Nations Peacekeepers
31World No-Tobacco Day
4International Day of Innocent Children Victims of Aggression
5World Environment Day
17World Day to Combat Desertification and Drought
20World Refugee Day
23United Nations Public Service Day
26International Day Against Drug Abuse and Illicit Trafficking and 
International Day in Support of Victims of Torture
First SaturdayInternational Day of Cooperatives
11World Population Day
9International Day of the World's Indigenous People
12International Youth Day
23International Day for the Remembrance of the Slave Trade and its Abolition
8International Literacy Day
15International Day of Democracy
16International Day for the Preservation of the Ozone Layer
21International Day of Peace (formerly the opening day of the UN General Assembly, changed to a set date as of 2002)
During last WeekWorld Maritime Day
1International Day for Older Persons
4 - 10World Space Week
5World Teacher's Day
First MondayWorld Habitat Day
Second WednesdayInternational Day for Natural Disaster Reduction
9World Post Day
10World Mental Health Day
16World Food Day
17International Day for the Eradication of Proverty
24United Nations Day and 
World Development Information Day
Disarmament Week
6International Day for Preventing the Exploitation of the Environment in War and Armed Conflict
14World Diabetes Day
16International Day of Tolerance
Third SundayWorld Day of Remembrance for Road Traffic Victims
20Universal Children's Dayand 
Africa Industrialization Day
21World Television Day
25International Day for the Elimination of Violence against Women
29International Day of Solidarity with the Palestinian People
1World AIDS Day
2International Day for the Abolition of Slavery
3International Day of Disabled Persons
5International Volunteer Day for Economic and Social Development
7International Civil Aviation Day
9International Anti-Corruption Day
10Human Rights Day
11International Mountain Day
18International Migrants Day
19United Nations Day for South-South Cooperation
20International Human Solidarity Day