World’s Important Days or International Days are days to observe issue of world’s concern and interest. These international days are days used by the world community to commemorate, promote and mobilize for certain action.
January
- January 1 : International Day of Peace (World Peace Day)
- January 1 : Global Family Day
- January 5 : World Environment Day
- January 6 : World Day – War Orphans
- January 10 : World Laughter Day
- January 24 : National Girl Child Day of India
- January 26 : International Customs day
- January 27 : International Holocaust Remembrance Day
- January 28 : Data Protection Day
- January 30 : World Leprosy Eradication Day
February
- February 2 : World Wetland Day
- February 4 : World Cancer Day
- February 5 : Kashmir Day (Organized by Pakistan)
- February 6 : International Day against Female Genital Mutilation
- February 12 : Darwin Day
- February 12 : World Day of the Sick
- February 14 : Valentine’s Day
- February 20 : World Day of Social Justice
- February 21 : International Mother Language Day
- February 22 : World Scout Day
- February 23 : World Peaces and Understanding Day
March
- March 4 : World Day of the Fight Against Sexual Exploitation
- March 8 : International Womens’ Day
- March 8 : International Literacy Day
- March 13 : World Kidney Day
- March 13 : World Rotaract Day
- March 15 : World Disabled Day
- March 15 : World Consumer Rights Day
- March 20 : International Day of the Francophonie
- March 20 : World Day of Theatre for Children and Young People
- March 21 : World Sleep Day
- March 21 : World Forestry Day
- March 21 : International Day for the Elimination of Racial Discrimination
- March 22 : World Water Day
- March 23 : World Meteorological Day
- March 24 : World TB Day
- March 24 : International Day for Achievers
- March 25 : International Day of Remembrance – Victims of Slavery and Transatlantic Slave Trade
- March 27 : World Drama Day
April
- April 2 : World Autism Awareness Day
- April 4 : International Day for Mine Awareness and Assistance in Mine Action
- April 7 : World Health Day
- April 7 : International Day of Reflection on the Genocide in Rwanda
- April 12 : World Aviation & Cosmonautics Day
- April 17 : World Haemophilia Day
- April 18 : World Heritage Day
- April 21 : World Creativity and Innovation Day
- April 22 : Earth Day
- April 23 : World Book and Copyright Day
- April 24 : World Lab Animals Day
- April 25 : World Malaria Day
- April 26 : World Intellectual Property Day
- April 28 : International Worker’s Memorial Day
- April 29 : World Dance Day
May
- May 1 : International Labour Day (May Day)
- May 3 : Press Freedom Day
- May 3 : International Sun Day
- May 3 : World Asthma Day
- May 4 : Coal Miners Day
- May 4 : International Firefighters’ Day
- May 5 : World Athletics Day
- May 8 : World Red Cross Day and Red Crescent Day
- May 8 : Remembrance and Reconciliation for Lost Lives Second World War
- May 9 : World Thalassaemia Day
- May 10 : World Mother Day
- May 12 : International Nurses Day
- May 13 : International Criminal Court Day
- May 14 : Bone and Joint Day
- May 15 : International Day of the Families
- May 17 : World Information Society Day
- May 18 : World Hyper Tension Day
- May 18 : World Museum Day
- May 19 : World Hepatitis Day
- May 20 : World Metrology Day
- May 21 : World Day for Cultural Diversity for Dialogue and Development
- May 22 : International Day for Biological Diversity
- May 23 : World Turtle Day
- May 24 : Commonwealth Day
- May 28 : Anti-Narcotics Day
- May 28 : Engineers Day
- May 29 : International Day of United Nations Peacekeepers
- May 31 : World Anti Tobacco Day
June
- June 1 : International Children’s Day
- June 4 : International Day of Innocent Children Victims of Aggression
- June 5 : World Environment Day
- June 8 : World Brain Tumors Day
- June 8 : World Ocean Day
- June 12 : World Day Against Child Labor
- June 14 : World Blood Donor Day
- June 15 : World Father’s Day
- June 16 : International Integration Day
- June 17 : World Combat Day to Desertification and Drought
- June 18 : International Picnic Day
- June 20 : World Refugee Day
- June 21 : World Music Day
- June 23 : International Olympic Day
- June 23 : United Nations Public Service Day
- June 26 : International Day against Drug abuse and Illicit Trafficking
- June 26 : International Day in Support of Victims of Torture
July
- July 1 : International Joke Day
- July 1 : Doctor’s Day
- July 2 : World Sports Journalists Day
- July 6 : World Zoonoses Day
- July 11 : World Population Day
- July 28 : World Nature Conservation Day 1st Saturday : International Day of Co-operatives
August
- August 1 : World Breast-feeding Week
- August 3 : Friendship Day
- August 6 : Anti Nuclear Day
- August 6 : Hiroshima Day
- August 9 : Nagasaki Day
- August 9 : International Day of the World’s Indigenous People
- August 12 : International Youth Day
- August 13 : World Left Hander’s Day
- August 15 : International Mourning Day
- August 19 : World Humanitarian Day
- August 19 : World Photography Day
- August 20 : World Mosquito Day
- August 23 : International Day for the Remembrance of the Slave Trade and Its Abolition
September
- September 1 : Coconut Day
- September 8 : World Literacy Day
- September 10 : World Anti-Suicide Day
- September 11 : World First Aid Day
- September 15 : International Day of Democracy
- September 15 : International Day of Engineers
- September 16 : World Ozone Day
- September 17 : International Red Panda Day
- September 19 : International Talk Like a Pirate Day
- September 21 : World Peace Day
- September 21 : World Alzheimer’s Day
- September 22 : World Car Free Day
- September 22 : World Rose Day – Welfare of Cancer Patients
- September 22 : Right to Know Day
- September 22 : World Rabies Day 4th Thursday : World Maritime Day
- September 24 : World Heart Day
- September 24 : World Clean-up Day
- September 24 : International Grab Hand Day
- September 26 : Day of the Deaf
- September 26 : European Day of Languages
- September 27 : World Tourism Day
October
- October 1 : World Vegetarian Day
- October 1 : International Day of the Elderly
- October 1 : World Hepatitis Day
- October 2 : World Animal Day
- October 2 : World Ostony Day
- October 2 : International Day of Non-Violence
- October 3 : World Habitat Day
- October 4 : World Animal Welfare Day
- October 5 : World and International Teacher’s Day
- October 6 : World Hospice and Palliative Care Day
- October 8 : World Humanitarian Action Day
- October 9 : World Postal Day
- October 10 : World Mental Health Day
- October 12 : World Sight Day
- October 12 : World Arthritis Day
- October 13 : International Day for Natural Disaster Reduction
- October 14 : World Standards Day
- October 15 : Global Hand Washing Day
- October 15 : World White Cane Day-guiding the Blind
- October 15 : International Day of Rural Women
- October 16 : World Food Day
- October 16 : World Anaesthesiologists Day
- October 17 : World Trauma Day
- October 20 : World Osteoporosis Day
- October 24 : UN Day
- October 24 : World Development Information Day
- October 24 : World Polio Day
- October 30 : World Thrift Day
November
- November 1 : World Vegan Day
- November 5 : World Interact Day
- November 6 : International Day for Preventing the Exploitation of the Environment in War and Armed Conflict
- November 8 : World Radiographer Day
- November 9 : World Freedom Day
- November 14 : World Diabetes Day
- November 16 : International Day for Tolerence
- November 17 : International Students Day
- November 19 : World Toilet Day
- November 19 : International Men’s Day
- November 20 : Universal Children’s Day
- November 20 : Africa Industrialization Day
- November 21 : World Fisheries Day
- November 21 : World Hello Day
- November 21 : World Television Day
- November 25 : International Day for the Elimination of Violence Against Women
- November 25 : International Meatless
- November 29 : International Day of Solidarity with Palestinian People
December
- December 1 : World AIDS Day
- December 2 : World Computer Literacy Day
- December 2 : International Day for the Abolition of Slavery
- December 3 : International Day of Disabled People
- December 3 : World Conservation Day
- December 5 : International Volunteer Day for Economic and Social Development
- December 7 : International Civil Aviation Day
- December 9 : The International Day Against Corruption
- December 10 : International Day of Broadcasting
- December 10 : Human Rights Day
- December 11 : International Mountain Day
- December 14 : World Energy Day
- December 18 : International Migrants Day
- December 20 : International Human Solidarity Day
- December 29 : International Biodiversity Day