Top January |
| 27 January | International Day of Commemoration in Memory of the Victims of the Holocaust | A/RES/60/7 |
Top February |
| 4 February | World Cancer Day [WHO] | A/RES/62/10 |
| 20 February | World Day of Social Justice | A/RES/62/10 |
| 21 February | International Mother Language Day [UNESCO] | A/RES/56/262 |
Top March |
| 8 March | International Women's Day | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | — |
| 21 March | International Day for the Elimination of Racial Discrimination
| A/RES/2142 (XXI) |
| 21 March | World Poetry Day [UNESCO] | — |
| 22 March | World Water Day | 2009 | 2008 | 2007 | A/RES/47/193 |
| 23 March | World Meteorological Day [WMO] | WMO/EC-XII/Res.6 |
| 24 March | World Tuberculosis Day [WHO] | WMO/EC-XII/Res.6 |
| 25 March | International Day of Remembrance of the Victims of Slavery and the Transatlantic Slave Trade - 2009 | 2008 | A/RES/62/122
|
Top April |
| 2 April | World Autism Awareness Day | A/RES/62/139 |
| 4 April | International Day for Mine Awareness and Assistance in Mine Action | A/RES/60/97 |
| 7 April | World Health Day [WHO] | WHA/A.2/Res.35 |
| 22 April | International Mother Earth Day | A/RES/63/278 |
| 23 April | World Book and Copyright Day [UNESCO]
| Resolution 3.18 of the 28th session of the UNESCO General Conference |
| 25 April | World Malaria Day [WHO] | — |
| 26 April | World Intellectual Property Day [WIPO] | — |
| 28 April | World Day for Safety and Health at Work [ILO] | — |
Top May |
| 3 May | World Press Freedom Day | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | A/DEC/48/432 |
| 8-9 May | Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War | A/RES/59/26 |
| 9-10 May | World Migratory Bird Day [UNEP] | — |
| 15 May | International Day of Families | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996
| A/RES/47/237 |
| 17 May | World Telecommunication and Information Society Day 2009 | 2008 | 2007 | 2006 | A/RES/60/252 |
| 21 May | World Day for Cultural Diversity for Dialogue and Development | A/RES/57/249 |
| 22 May | International Day for Biological Diversity | A/RES/55/201 |
| 29 May | International Day of UN Peacekeepers | 2009 | 2008 - 60th Anniversary of UN Peacekeeping | 2007 | 2006 | 2005 | 2004 | 2003 | A/RES/57/129 |
| 31 May | World No-Tobacco Day [WHO] | 2009 | 2008 | 2007 | Resolution 42.19 of the 42nd session of WHO |
Top June |
| 4 June | International Day of Innocent Children Victims of Aggression | A/RES/ES-7/8 |
| 5 June | World Environment Day | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | A/RES/2994 (XXVII) |
| 8 June | World Oceans Day | A/RES/63/111 |
| 12 June | World Day Against Child Labour [ILO] | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | — |
| 14 June | World Blood Donor Day [WHO] | 2009 | 2008 | 2007 | 2006 | WHA58.13 |
| 17 June | World Day to Combat Desertification and Drought | 2009 | 2008 | 2007 | A/RES/49/115 |
| 20 June | World Refugee Day | A/RES/55/76 |
| 23 June | United Nations Public Service Day | A/RES/57/277 |
| 26 June | International Day against Drug Abuse and Illicit Trafficking | A/RES/42/112 |
| 26 June | United Nations International Day in Support of Victims of Torture | A/RES/52/149 |
Top July |
First Saturday of July | International Day of Cooperatives | A/RES/47/90 |
| 11 July | World Population Day | UNDP decision 89/46 |
| 18 July | Nelson Mandela International Day | GA draft resolution A/64/L.13 (A/RES/64/13) |
Top August |
| 9 August | International Day of the World's Indigenous People | 2009 | 2008 | 2007 | 2006 | 2005 | A/RES/49/214 |
| 12 August | International Youth Day | A/RES/54/120 |
| 19 August | World Humanitarian Day | A/RES/63/139 |
| 23 August | International Day for the Remembrance of the Slave Trade and Its Abolition [UNESCO] | Decision 8.2 of the 150th session of the UNESCO Executive Board |
Top September |
| 8 September | International Literacy Day [UNESCO] | Resolution 1.141 of the 14th session of the UNESCO General Conference |
| 10 September | World Suicide Prevention Day [WHO] | — |
| 15 September | International Day of Democracy | A/RES/62/7 |
| 16 September | International Day for the Preservation of the Ozone Layer | A/RES/49/114 |
| 21 September | International Day of Peace | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | A/RES/36/67 A/RES/55/282 |
| 27 September | World Tourism Day [WTO] | — |
| 27 September | World Heart Day [WHO] | — |
| 28 September | World Rabies Day [WHO]
| — |
Last week of September | World Maritime Day [IMO] (24 September) | IMCO/C XXXVIII/21 |
Top October |
| 1 October | International Day of Older Persons | 2009 | 2006 | 2005 | 2002 | A/RES/45/106 |
| 2 October | International Day of Non-Violence | 2009 | 2008 | 2007 | A/RES/61/271 |
| 5 October | World Teachers’ Day [UNESCO] | UNESCOPRESSE, vol.4, no.17, p.9 |
First Monday in October | World Habitat Day (5 October) | 2009 | 2008 | A/RES/40/202 A |
Second Wednesday in October | International Day for Natural Disaster Reduction (14 October) | A/RES/44/236 |
Second Thursday in October | World Sight Day [WHO] (8 October) | — |
| 9 October | World Post Day [UPU] | UPU/Tokyo Congress 1969/Res.C.11 |
| 10 October | World Mental Health Day [WHO] | — |
| 15 October | International Day of Rural Women | A/RES/62/136 |
| 16 October | World Food Day
| A/RES/35/70 |
| 17 October | International Day for the Eradication of Poverty 2009 | 2006 | 2004 | 2002 | A/RES/47/196 |
| 24 October | United Nations Day | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2001
| A/RES/168 (II) A/RES/2782 (XXVI) |
| 24 October | World Development Information Day | A/RES/3038 (XXVII) |
| 27 October | World Day for Audiovisual Heritage [UNESCO] | — |
Top November |
| 6 November | International Day for Preventing the Exploitation of the Environment in War and Armed Conflict | A/RES/56/4 |
| 10 November | World Science Day for Peace and Development [UNESCO] | — |
| 14 November | World Diabetes Day [WHO] | A/RES/61/225 |
| 16 November | International Day for Tolerance | Resolution 5.61 of the 28th session of the UNESCO General Conference
A/RES/51/95 |
Third Sunday in November | World Day of Remembrance for Road Traffic Victims (16 November) | A/RES/60/5 |
| 19 November | World Chronic Obstructive Pulmonary Disease Day [WHO] | — |
Third Thursday in November | World Philosophy Day [UNESCO] | — |
| 20 November | Universal Children’s Day |
— |
| 20 November | Africa Industrialization Day | A/RES/44/237
|
| 21 November | World Television Day | A/RES/51/205 |
| 25 November | International Day for the Elimination of Violence against Women | 2008 | 2007 | 2005 | A/RES/54/134 |
| 29 November | International Day of Solidarity with the Palestinian People | A/RES/32/40B |
Top December |
| 1 December | World AIDS Day | 2008 | 2007 | 2006 | 2005 | 2004 | 2001 | 2000
| — |
| 2 December | International Day for the Abolition of Slavery | — |
| 3 December | International Day of Persons with Disabilities | A/RES/47/3 |
| 5 December | International Volunteer Day for Economic and Social Development | A/RES/40/212 |
| 7 December | International Civil Aviation Day [ICAO] | A/RES/51/33 |
| 9 December | International Anti-Corruption Day | A/RES/58/4 |
| 10 December | Human Rights Day | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | A/RES/423 (V) |
| 11 December | International Mountain Day | A/RES/57/245 |
| 18 December | International Migrants Day | A/RES/55/93 |
| 19 December | United Nations Day for South-South Cooperation | A/RES/58/220 |
| 20 December | International Human Solidarity Day | A/RES/60/209 |