These are the international days currently observed by the United Nations. New international days are established regularly.
7 January: International Day of Commemoration in Memory of the Victims of the Holocaust
4 February: World Cancer Day
6 February: International Day of Zero Tolerance to Female Genital Mutilation
13 February: World Radio Day [UNESCO]
20 February: World Day of Social Justice
21 February: International Mother Language Day [UNESCO]
1 March: Zero Discrimination Day [UNAIDS]
3 March: World Wildlife Day
8 March: International Women’s Day
20 March: International Day of Happiness
21 March: International Day for the Elimination of Racial Discrimination
21 March: World Poetry Day [UNESCO]
21 March: International Day of Nowruz
21 March: World Down Syndrome Day
21 March: International Day of Forests
22 March: World Water Day
23 March: World Meteorological Day [WMO]
24 March: World Tuberculosis Day [WHO]
24 March: International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims
25 March: International Day of Remembrance of the Victims of Slavery and the Transatlantic Slave Trade
25 March: International Day of Solidarity with Detained and Missing Staff Members
2 April: World Autism Awareness Day
4 April: International Day for Mine Awareness and Assistance in Mine Action
6 April: International Day of Sport for Development and Peace
7 April: International Day of Reflection on the Genocide in Rwanda
7 April: World Health Day [WHO]
12 April: International Day of Human Space Flight
22 April: International Mother Earth Day
23 April: World Book and Copyright Day (UNESCO )
23 April: English Language Day
24-30 April: World Immunization Week [WHO]
25 April: World Malaria Day [WHO]
26 April: World Intellectual Property Day [WIPO]
28 April: World Day for Safety and Health at Work
29 April: Day of Remembrance for all Victims of Chemical Warfare
30 April: International Jazz Day
3 May: World Press Freedom Day
8-9 May: Time of Remembrance and Reconciliation for Those Who Lost Their Lives During the Second World War
9-10 May: World Migratory Bird Day [UNEP]
15 May: International Day of Families
17 May: World Telecommunication and Information Society Day [ITU]
21 May: World Day for Cultural Diversity for Dialogue and Development
22 May: International Day for Biological Diversity
23 May: International Day to End Obstetric Fistula
29 May: International Day of UN Peacekeepers
31 May: World No-Tobacco Day [WHO]
1 June: Global Day of Parents
1 June: “Vesak”, the Day of the Full Moon
4 June: International Day of Innocent Children Victims of Aggression
5 June: World Environment Day [UNEP]
6 June: Russian Language Day at the UN
8 June: World Oceans Day
12 June: World Day Against Child Labour
13 June: International Albinism Awareness Day
14 June: World Blood Donor Day [WHO]
15 June: World Elder Abuse Awareness Day
17 June: World Day to Combat Desertification and Drought
20 June: World Refugee Day
21 June: International Day of Yoga
23 June: United Nations Public Service Day
23 June: International Widows’ Day
25 June: Day of the Seafarer [IMO]
26 June: International Day against Drug Abuse and Illicit Trafficking
26 June: United Nations International Day in Support of Victims of Torture
4 July: (first Saturday in July) International Day of Cooperatives
11 July:World Population Day (UNDP)
15 July: World Youth Skills Day
18 July: Nelson Mandela International Day
28 July: World Hepatitis Day [WHO]
30 July: International Day of Friendship
30 July: World Day against Trafficking in Persons
9 August: International Day of the World’s Indigenous Peoples
12 August: International Youth Day
19 August: World Humanitarian Day
23 August: International Day for Remembrance of Slave Trade and Its Abolition [UNESCO]
29 August: International Day against Nuclear Tests
30 August: International Day of the Victims of Enforced Disappearances
5 September: International Day of Charity
8 September: International Literacy Day [UNESCO]
12 September: United Nations Day for South-South Cooperation
15 September: International Day of Democracy
16 September: International Day for the Preservation of the Ozone Layer
21 September: International Day of Peace
25 September: (last week of September) World Maritime Day [IMO]
26 September: International Day for the Total Elimination of Nuclear Weapons
27 September:World Tourism Day
1 October: International Day of Older Persons
2 October: International Day of Non-Violence
5 October: World Teachers’ Day [UNESCO]
5 October: (first Monday in October) World Habitat Day
9 October: World Post Day (UPU)
10 October: World Mental Health Day [WHO]
11 October: International Day of the Girl Child
13 October: International Day for Disaster Reduction
15 October: International Day of Rural Women
16 October: World Food Day [FAO]
17 October: International Day for the Eradication of Poverty
20 October: World Statistics Day
24 October: United Nations Day
24 October: World Development Information Day
27 October: World Day for Audiovisual Heritage [UNESCO]
31 October: World Cities Day
2 November: International Day to End Impunity for Crimes against Journalists
6 November: International Day for Preventing Exploitation of Environment in War & Armed Conflict
10 November: World Science Day for Peace and Development
14 November: World Diabetes Day
15 November: (third Sunday in November) World Day of Remembrance for Road Traffic Victims
16 November: International Day for Tolerance (UNESCO)
19 November: World Toilet Day
19 November: (third Thursday in November) World Philosophy Day
20 November: Africa Industrialization Day
20 November: Universal Children’s Day
21 November: World Television Day
25 November: International Day for the Elimination of Violence against Women
29 November: International Day of Solidarity with the Palestinian People
1 December: World AIDS Day
2 December: International Day for the Abolition of Slavery
3 December: International Day of Persons with Disabilities
5 December: International Volunteer Day for Economic and Social Development
5 December: World Soil Day [FAO]
7 December: International Civil Aviation Day [ICAO]
9 December: International Day of Commemoration and Dignity of the Victims of the Crime of Genocide and of the Prevention of this Crime
9 December: International Anti-Corruption Day
10 December: Human Rights Day
11 December: International Mountain Day
18 December: International Migrants Day
20 December: International Human Solidarity Day