UN observation days
Africa Industrialization
AIDS
Albinism Awareness
Anti-Corruption
Asteroid
Arabic Language
Audiovisual Heritage
Autism Awareness

Aviation

Banks
Bee
Bicycle
Biological Diversity
Blood Donor
Book and Copyright
Braille
Chagas Disease
Charity
Chernobyl Disaster
Chess
Child Labour
Children
Children Victims of Aggression
Chinese Language
Cities
Clean Air for Blue Skies
Cooperatives
First Saturday of July
Conscience
Creativity and Innovation
Crimes against Journalists
Cultural Diversity for Dialogue and Development
Democracy
Delegates
Detained and Missing Staff Members
Desertification and Drought
Development Information
Diabetes

Disabilities persons

Disaster Risk Reduction
Down Syndrome
Drug Abuse and Illicit Trafficking
Earth
Education
Education from Attack
Elder Abuse
End Obstetric Fistula
English Language
Environment
Environment in War and Armed Conflict
Epidemic Preparadness
Equal Pay
Families day
Family Remittances
Female Genital Mutilation
Fishing (Illegal, Unreported and Unregulated)
Food Day
Food Loss and Waste
Food Safety
Forests
French Language
Full Moon
Friendship
Girl Child
Girls in ICT Day [ITU]
Fourth Thursday of April
Girls in Science
Habitat Day
First Monday of October
Happiness day
Health Day
Health Coverage Day
Hepatitis Day
Holocaust victims
Human Fraternity
Human Rights Day
Human Solidarity Day 
Human Rights Violations and for the Dignity of Victims
Human Space Flight
Humanitarian Day 
Indigenous People
Information day
Intellectual Property Day
Jazz Day 
Light
Literacy
Living Together in Peace
Malaria Day
Maritime Day
Last Thursday of September
Mental Health Day
Meteorological Day
Micro-, Small and Medium-sized Enterprises Day
Migrants
Mine Awareness
Mother Language
Mountain
Multilateralism and Diplomacy for Peace
Nelson Mandela International Day
Neutrality
Non-Violence
No-Tobacco Day
Nowruz
Nuclear Tests 
Oceans Day
Older Persons
Ozone Layer 
Palestinian People
Parents day
Parliamentarism
Patient Safety Day
Peace
Philosophy Day
Third Thursday of November
Poetry Day
Population Day
Post Day
Poverty eradication
Press Freedom Day
Pulses Day
Racial Discrimination
Radio Day
Refugee Day
Road Traffic Victims
Third Sunday of November
Rural Women
Russian Language Day
Safety and Health at Work
Science Day for Peace and Development
Seafarer day
Sexual Violence in Conflict
Slavery abolition
Slavery and the Transatlantic Slave Trade
Sign Languages day
Slave Trade and Its Abolition
Spanish Language Day
Social Justice
Soil Day
Solstice
South-South Cooperation
Sport for Development and Peace
Statistics Day
Every five years, beginning in 2010
Sustainable Gastronomy

Tea Day

Teachers’ Day
Telecommunication and Information Society Day
Television Day
Tolerance
Toilet Day
Total Elimination of Nuclear Weapons
Tourism Day
Tsunami Awareness Day
Trafficking in Persons
Translation Day
Tropics day
Tuberculosis Day
Tuna Day
UN Peacekeepers
UN Public Service Day
United Nations Day
"Vesak"
Victims of Acts of Violence Based on Religion or Belief
Victims of Chemical
Victims of the Crime of Genocide and of the Prevention of this Crime
Victims of Enforced Disappearances
Victims of Terrorism
Victims of Torture
Violence against Women
Volunteer Day for Economic and Social Development
Warfare 
Water Day
Widows' Day
Wildlife Day
Women's Day
World War (Second)
8-9 May
Yoga day
Youth Skills Day
Youth Day
Zero Discrimination Day
1994 Genocide against the Tutsi in Rwanda