| World Braille Day | |  |
| World Religion Day | | |
| International Hoof Care Week | | |
| World Leprosy Day | | |
| International Customs Day | | |
| International Day of Commemoration in Memory of the Victims of the Holocaust | | |
| International Networking Week | | |
| World Interfaith Harmony Week | | |
| World Wetlands Day | | |
| World Cancer Day | | |
| International Day of Zero Tolerance for Female Genital Mutilation | | |
| Safer Internet Day | | |
| International Day of Women and Girls in Science | | |
| World Day of the Sick | | |
| World Radio Day | | |
| World Day of Social Justice | | |
| International Mother Language Day | | |
| Self-Injury Awareness Day | | |
| Zero Discrimination Day | | |
| World Wildlife Day | | |
| International Women's Day | | |
| World Kidney Day | | |
| International Day of Happiness | | |
| International Francophonie Day | | |
| International Day for the Elimination of Racial Discrimination | | |
| International Day of Forests | | |
| International Nowruz Day | | |
| World Down Syndrome Day | | |
| World Poetry Day | | |
| World Water Day | | |
| World Meteorological Day | | |
| International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims | | |
| World Tuberculosis Day | | |
| International Day of Remembrance of Slavery Victims and the Transatlantic Slave Trade | | |
| International Day of Solidarity with Detained and Missing Staff Members | | |
| Earth Hour | | |
| April Fool's Day | | |
| World Autism Awareness Day | | |
| International Day for Mine Awareness and Assistance in Mine Action | | |
| International Day of Sport for Development and Peace | | |
| Day of Remembrance of the Victims of the Rwanda Genocide | | |
| World Health Day | | |
| International Romani Day | | |
| International Day of Human Space Flight | | |
| Equal Pay Day | | |
| International Day for Monuments and Sites | | |
| Chinese Language Day | | |
| English Language Day | | |
| World Book and Copyright Day | | |
| World Malaria Day | | |
| International Chernobyl Disaster Remembrance Day | | |
| World Intellectual Property Day | | |
| World Day for Safety and Health at Work | | |
| International Jazz Day | | |
| World Tuna Day | | |
| World Press Freedom Day | | |
| Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War | | |
| World Migratory Bird Day | | |
| World Ovarian Cancer Day | | |
| International Nurses Day | | |
| International Day of Families | | |
| World Telecommunication and Information Society Day | | |
| International Museum Day | | |
| World Autoimmune / Autoinflammatory Arthritis Day | | |
| World Day for Cultural Diversity for Dialogue and Development | | |
| International Day for Biological Diversity | | |
| International Day to End Obstetric Fistula | | |
| International Day of United Nations Peacekeepers | | |
| World No Tobacco Day | | |
| Global Day of Parents | | |
| International Day of Innocent Children Victims of Aggression | | |
| World Environment Day | | |
| World Oceans Day | | |
| World Day Against Child Labour | | |
| International Albinism Awareness Day | | |
| World Blood Donor Day | | |
| World Elder Abuse Awareness Day | | |
| International Day of Family Remittances | | |
| World Day to Combat Desertification and Drought | | |
| International Day for the Elimination of Sexual Violence in Conflict | | |
| World Refugee Day | | |
| International Day of Yoga | | |
| International Widows' Day | | |
| Public Service Day | | |
| Day of the Seafarer | | |
| International Day Against Drug Abuse and Illicit Trafficking | | |
| International Day in Support of Victims of Torture | | |
| International Asteroid Day | | |
| International Day of Cooperatives | | |
| World Population Day | | |
| World Youth Skills Day | | |
| Nelson Mandela Day | | |
| World Hepatitis Day | | |
| International Day of Friendship | | |
| World Day against Trafficking in Persons | | |
| World Breastfeeding Week | | |
| World Wide Web Day | | |
| International Day of the World's Indigenous People | | |
| International Youth Day | | |
| Friday the 13th | | |
| World Humanitarian Day | | |
| International Day for the Remembrance of the Slave Trade and its Abolition | | |
| International Day against Nuclear Tests | | |
| International Day of the Victims of Enforced Disappearances | | |
| International Overdose Awareness Day | | |
| World Sexual Health Day | | |
| International Day of Charity | | |
| International Literacy Day | | |
| World Suicide Prevention Day | | |
| International Day for South-South Cooperation | | |
| Programmers Day | | |
| International Day of Democracy | | |
| International Day for the Preservation of the Ozone Layer | | |
| European Heritage Days | | |
| International Equal Pay Day | | |
| International Day of Peace | | |
| International Day for the Total Elimination of Nuclear Weapons | | |
| World Tourism Day | | |
| World Rabies Day | | |
| World Heart Day | | |
| World Maritime Day | | |
| International Day of Older Persons | | |
| International Music Day | | |
| World Vegetarian Day | | |
| International Day of Non-Violence | | |
| World Architecture Day | | |
| World Habitat Day | | |
| World Space Week | | |
| World Teachers' Day | | |
| World Cerebral Palsy Day | | |
| International Podiatry Day | | |
| World Migratory Bird Day | | |
| World Post Day | | |
| World Mental Health Day | | |
| International Day of the Girl Child | | |
| International Day for Natural Disaster Reduction | | |
| International Skeptics Day | | |
| World Sight Day | | |
| International Day of Rural Women | | |
| World Food Day | | |
| International Day for the Eradication of Poverty | | |
| Disarmament Week | | |
| United Nations Day | | |
| World Development Information Day | | |
| World Day for Audiovisual Heritage | | |
| World Stroke Day | | |
| World Cities Day | | |
| World Vegan Day | | |
| International Day to End Impunity for Crimes against Journalists | | |
| International Day for Preventing the Exploitation of the Environment in War and Armed Conflict | | |
| World Science Day for Peace and Development | | |
| World Pneumonia Day | | |
| World Diabetes Day | | |
| International Day for Tolerance | | |
| World Prematurity Day | | |
| World Pancreatic Cancer Day | | |
| World Philosophy Day | | |
| International Men's Day | | |
| World Toilet Day | | |
| Africa Industrialization Day | | |
| Universal Children's Day | | |
| World Day of Remembrance for Road Traffic Victims | | |
| World Television Day | | |
| International Day for the Elimination of Violence against Women | | |
| International Day of Solidarity with the Palestinian People | | |
| Day of Remembrance for all Victims of Chemical Warfare | | |
| Giving Tuesday | | |
| World AIDS Day | | |
| International Day for the Abolition of Slavery | | |
| International Day of Persons with Disabilities | | |
| International Volunteer Day for Economic and Social Development | | |
| World Soil Day | | |
| International Civil Aviation Day | | |
| International Anti-Corruption Day | | |
| World Genocide Commemoration Day | | |
| Human Rights Day | | |
| International Mountain Day | | |
| Arabic Language Day | | |
| International Migrants Day | | |
| International Human Solidarity Day | | |
