This is the list of the United Nations(UN) International Calendar Days 2021 and International Observance Days 2021 of the United Nations(UN).
The United Nations and its specialized agencies like, UNESCO designate these specific days, weeks, years and decades for the awareness of the general public about issues and their solutions.
United Nations proclaims a particular theme for each day to attain international peace, security and Sustainable Development Goal 2030.
January
- January
World Braille Day
- January
International Day of Education
- January
International Day of Commemoration in Memory of the Victims of the Holocaust
February
- February
International Day of Human Fraternity
- February
International Day of Zero Tolerance to Female Genital Mutilation
- February
World Pulses Day
- February
International Day of Women and Girls in Science
- February
World Radio Day
- February
World Day of Social Justice
- February
International Mother Language Day
March
- March
Zero Discrimination Day
- March
World Wildlife Day
- March
International Women’s Day
- March
International Day of Happiness
- March
International Day for the Elimination of Racial Discrimination
- March
World Poetry Day
- March
International Day of Nowruz
[Persian New Year]- March
World Down Syndrome Day
- March
International Day of Forests
- March
World Water Day
- March
World Meteorological Day
- March
World Tuberculosis Day
- March
International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims
- March
International Day of Remembrance of the Victims of Slavery and the Transatlantic Slave Trade
- March
International Day of Solidarity with Detained and Missing Staff Members
April
- April
World Autism Awareness Day
- April
International Day for Mine Awareness and Assistance in Mine Action
- April
International Day of Conscience
- April
International Day of Sport for Development and Peace
- April
International Day of Reflection on the 1994 Genocide in Rwanda
- April
World Health Day
- April
International Day of Human Space Flight
- April
International Day For Monuments and Sites
- April
World Creativity and Innovation Day
Fourth Thursday of April
International Girls in ICT Day
- April
Earth Day
- April
World Book and Copyright Day
- April
International Day of Multilateralism and Diplomacy for Peace
- April
International Delegate’s Day
- April
World Malaria Day
- April
Day of the Tree
- April
International Chernobyl Disaster Remembrance Day
- April
World Intellectual Property Day
- April
World Day for Safety and Health at Work
- April
Day of Remembrance for all Victims of Chemical Warfare
- April
International Dance Day
- April
International Jazz Day
May
First full moon in May
Vesak, the Day of the Full Moon
[Buddha Day]- May
World Tuna Day
- May
World Press Freedom Day
8.-9. May
Time of Remembrance and Reconciliation for Those Who Lost Their Lives During the Second World War
The second weekend in May
World Migratory Bird Day
- May
International Day of Families
- May
International Day of Living Together in Peace
- May
International Day of Light
- May
World Telecommunication and Information Society Day
- May
World Bee Day
- May
World Tea Day
- May
World Day for Cultural Diversity for Dialogue and Development
- May
International Day for Biological Diversity
- May
International Day to End Obstetric Fistula
- May
International Day of UN Peacekeepers
- May
World No-Tobacco Day
June
- June
- June
- June
International Day of Innocent Children Victims of Aggression
- June
- June
International Day for the Fight against Illegal, Unreported and Unregulated Fishing
- June
World Food Safety Day
- June
World Oceans Day
- June
World Day Against Child Labour
- June
International Albinism Awareness Day
- June
World Blood Donor Day
- June
World Elder Abuse Awareness Day
- June
International Day of Family Remittances
- June
World Day to Combat Desertification and Drought
- June
Sustainable Gastronomy Day
- June
International Day for the Elimination of Sexual Violence in Conflict
- June
World Refugee Day
- June
- June
International Day of the Celebration of the Solstice
- June
United Nations Public Service Day
- June
- June
Day of the Seafarer
- June
International Day against Drug Abuse and Illicit Trafficking
- June
United Nations International Day in Support of Victims of Torture
- June
Micro, Small and Medium-sized Enterprises Day
- June
International Day of the Tropics
- June
International Asteroid Day
- June
International Day of Parliamentarism
July
First Saturday in July
International Day of Cooperatives
- July
World Population Day
- July
World Youth Skills Day
- July
Nelson Mandela International Day
- July
World Hepatitis Day
- July
International Day of Friendship
- July
World Day against Trafficking in Persons
August
- August
International Day of the World’s Indigenous Peoples
- August
International Youth Day
- August
World Humanitarian Day
- August
International Day of Remembrance and Tribute to the Victims of Terrorism
- August
International Day for the Remembrance of the Slave Trade and Its Abolition
- August
International Day against Nuclear Tests
- August
International Day of the Victims of Enforced Disappearances
September
- September
International Day of Charity
- September
International Literacy Day
- September
World Suicide Prevention Day
- September
United Nations Day for South-South Cooperation
- September
International Day of Democracy
- September
International Day for the Preservation of the Ozone Layer
- September
International Day of Peace
- September
International Day of Sign Languages
- September
International Day for the Total Elimination of Nuclear Weapons
- September
World Tourism Day
- September
World Rabies Day
- September
International Day for Universal Access to Information
- September
International Translation Day
Last Thursday of September
World Maritime Day
October
First Monday in October
World Habitat Day
- October
International Day of Older Persons
- October
International Day of Non-Violence
- October
World Teachers’ Day
- October
World Post Day
- October
World Mental Health Day
- October
International Day of the Girl Child
- October
International Day for Disaster Reduction
- October
International Day of Rural Women
- October
Global Handwashing Day
- October
World Food Day
- October
International Day for the Eradication of Poverty
- October (every five years, years divisible by 5)
World Statistics Day
- October
United Nations Day
- October
World Development Information Day
- October
World Day for Audiovisual Heritage
- October
World Cities Day
November
- November
International Day to End Impunity for Crimes against Journalists
- November
World Tsunami Awareness Day
- November
International Day for Preventing the Exploitation of the Environment in War and Armed Conflict
- November
World Science Day for Peace and Development
- November
World Diabetes Day
- November
International Day for Tolerance
Third Thursday in November
World Philosophy Day
Third Sunday in November
World Day of Remembrance for Road Traffic Victims
- November
World Toilet Day
- November
Africa Industrialization Day
- November
Universal Children’s Day
- November
World Television Day
- November
International Day for the Elimination of Violence against Women
- November
International Day of Solidarity with the Palestinian People
December
- December
World AIDS Day
- December
International Day for the Abolition of Slavery
- December
International Day of Persons with Disabilities
- December
International Volunteer Day for Economic and Social Development
- December
World Soil Day
- December
International Civil Aviation Day
- December
International Day of Commemoration and Dignity of the Victims of the Crime of Genocide and of the Prevention of this Crime
- December
International Anti-Corruption Day
- December
Human Rights Day
- December
International Mountain Day
- December
International Migrants Day
- December
International Human Solidarity Day
