February
• 2 World Wetlands Day
• 21 International Mother Language Day

March
• 8 International Women's Day
• 21 International Day for the Elimination of Racial Discrimination
• 21 World Poetry Day
• 21 International Day of Forests
• 22 World Water Day
• 23 World Meteorological Day

April
• 7 World Health Day
• 18 World Heritage Day
• 23 World Book and Copyright Day
• 24 International Day of Multilateralism and Diplomacy for Peace

May
• 3 World Press Freedom Day
• 15 International Day of Families
• 17 World Telecommunication Day + Information Society Day
• 21 World Day for Cultural Diversity for Dialogue and Development
• 22 International Day for Biological Diversity
• 25 Africa day
• 25- to 1 June - Week of Solidarity with the Peoples of Non-Self-Governing Territories
• 29 International Day of United Nations Peacekeepers
• 31 World No-Tobacco Day

June
• 4 International Day of Innocent Children Victims of Aggression
• 5 World Environment Day
• 8 World Oceans Day
• 17 World Day to Combat Desertification and Drought
• 20 World Refugee Day
• 23 United Nations Public Service Day

July
• 3 (First Saturday) International Day of Cooperatives
• 11 World Population Day
• 15 World Youth Skills Day
• 26 World Mangrove Day
• 30 World Day against Trafficking in Persons

August
• 9 International Day of the World's Indigenous People
• 12 International Youth Day
• 19 World Humanitarian Day
• 23 International Day for the Remembrance of the Slave Trade and its Abolition

September
• 8 International Literacy Day
• 16 International Day for the Preservation of the Ozone Layer
• 21 International Day of Peace
• 27 World Tourism Day
• Last Week World Maritime Day

October

Urban October Between World Habitat Day on 3 October, and World Cities Day on 30 October, the world community celebrates "Urban October" - a series of events and campaigns to promote a better urban future. Urban October was developed to raise awareness, promote participation, generate knowledge and engage the international community towards a New Urban Agenda, in 31 days of promoting a Better Urban Future.

• 1 International Day for Older Persons
• 4 - 10 World Space Week
• 3 World Habitat Day
• 5 World Teacher's Day
• 10 International day for Disaster Reduction
• 9 World Post Day
• 10 World Mental Health Day
• 16 World Food Day
• 17 International Day for the Eradication of Poverty
• 24 United Nations Day and World Development Information Day
• 24-30 Disarmament Week
• 31 World Cities Day

November
• 6 International Day for Preventing the Exploitation of the Environment in War and Armed Conflict
• 10 World Science Day for Peace and Development
• 16 International Day of Tolerance
• 19 World Toilet Day
• 20 Universal Children's Day and Africa Industrialization Day
• 21 World Television Day
• 21 World Fisheries Day
• 25 International Day for the Elimination of Violence against Women
• 29 International Day of Solidarity with the Palestinian People

December
• 1 World AIDS Day
• 2 International Day for the Abolition of Slavery
• 3 International Day of Disabled Persons
• 5 International Volunteer Day
• 7 International Civil Aviation Day
• 10 Human Rights Day
• 11 International Mountain Day
• 18 International Migrants Day

International Decades During the decade of 2020-2030, the world community also observes the following decades: • United Nations Decade on Ecosystem Restoration (2021-2030) • United Nations Decade of Healthy Ageing (2021-2030) • United Nations Decade of Ocean Science for Sustainable Development (2021-2030) • Nelson Mandela Decade of Peace (2019-2028) • United Nations Decade of Family Farming (2019-2028) • International Decade for Action "Water for Sustainable Development" (2018-2028) • Third United Nations Decade for the Eradication of Poverty (2018-2027) • United Nations Decade of Action on Nutrition (2016-2025) • Third Industrial Development Decade for Africa (2016-2025) • International Decade for People of African Descent (2015-2024) • United Nations Decade of Sustainable Energy for All (2014-2024)