DateOrganisation founderPeriodCountry where applicableHoliday typeDescription .April Astronomical Association of Northern California 1973 - present United States of America funny Astronomy Day 1.April 1906 - present International World day for birds 1.April International funny Fun at Work Day 1.April International Foolday 2.April United Nations Organisation International UN official World Autism Awareness Day 2.April International funny International Children's Book Day 2.April Iran national Iran - national picnic day 3.April International funny Walk to Work Day 3.April International funny World Party Day 4.April 1960 - present Senegal national Indepedence day of Senegal 4.April United Nations Organisation International UN official International Day for Mine Awareness and Assistance in Mine Action 4.April International funny Tell a Lie Day 4.April Taiwan Republic of China (Taiwan) and Hong Kong children's day 4.April International Women's day in Taiwan 5.April International funny Read a Road Map Day 5.April International funny First Contact Day 6.April Moldova national National Day of greening the country 6.April International funny Sorry Charlie Day 6.April United Nations Organisation International UN official International Day of Sport for Development and Peace 7.April United Nations Organisation 1948 - present International UN official World Health Day 7.April United Nations Organisation 2003 - present International UN official International Day of Reflection on the Genocide in Rwanda 7.April Armenia Armenia Mother's day, Motherhood and Beauty Day 8.April International World day of Roma peoples 9.April Israel Israel children's day 9.April International funny Be Kind to Lawyers Day 10.April International funny Siblings Day 11.April International funny Barbershop Quartet Day 11.April International Day of prisoners of fascist concentration camps 12.April International International day of Aviation and Aeronautics 12.April International funny Yuri's Night 12.April Bolivia Bolivia children's day 12.April United Nations Organisation 2011 - present International UN official International Day of Human Space Flight 12.April International funny Grilled Cheese Day 13.April International funny Scrabble Day 13.April International International Day of Rock-n-Roll 14.April Izzy Gesell International funny International Moment of Laughter Day 15.April International Birthday of Kim Ir Sen 16.April International funny Wear Pajamas to Work Day 16.April International Birthday of Queen Elizabeth II 16.April International funny Eggs Benedict Day 17.April Syria national National day of Siria 17.April 1961 - present Cuba Day of victory of counterrevolution 17.April 1948 - present Israel national Israel's independence day 18.April 2007 - present International funny Record Store Day 18.April International International day of historical monuments 18.April National Society of Newspaper Columnist International funny Columnist Day 18.April 1980 - present Zimbabwe national Zambabwe's independence day 19.April 1961 - present International Sierra leone Republic Day 20.April 1943 - present International Remembrance day of Holocaust victims 20.April International funny Look Alike Day 21.April 753 - present International Rome's foundation day 22.April International funny Jelly Bean Day 22.April United Nations Organisation 1970 - present International UN official World Earth Day 22.April 1500 - present International Day of discover of Brasil (by the Portuguese navigator Pedro Alvares Cabral, 1500) 23.April Turkey Turkey children's day 23.April United Nations Organisation International UN official English Language Day 23.April 2011 - present International funny Impossible Astronaut Day 23.April United Nations Organisation International UN official World Book and Copyright Day 23.April Gloria Steinem and the Ms. Foundation for Women 1993 - present International funny Take Our Daughters and Sons to Work Day 23.April International funny Take a Chance Day 23.April International funny Lover's Day 24.April 1915 - present Armenia 24.April Office of the Mayor of New YorkCity and Departament of Cultural Affairs 2003 - present International funny Poem in Your Pocket Day 24.April International World Day for Laboratory Animals Protection 24.April-30.April World Health Organization International UN official World Immunization Week 24.April International World water's Day 24.April International International Day of Solidarity Youth 25.April 1975 - present International Sinai liberation day 25.April Colombia Colombia children's day 25.April 1944 - present Italy Italy liberation day - day of allied military landing 25.April International Day of signing the Accession Treaty of Romania and Bulgaria to the EU in 2005 25.April 2002 - present International funny DNA Day 25.April International ANZAC Day. Commemoration of Australia and New Zealand Army Corps who fell in World War 25.April World Health Organization International UN official World Malaria Day 26.April International funny Pretzel Day 26.April 1964 - present Tanzania Ziua Unirii Republicii Unite Tanzania 26.April 1986 - present International Commemorate victims of the Chernobyl accident in 1986 26.April International funny Richter Scale Day 26.April United Nations Organisation International UN official World Intellectual Property Day 26.April International 27.April Togo national National Day of Togo 27.April International funny World Pinhole Photography Day 28.April International national National Veterans Day in Finland who died in World War II 28.April International Labour Organization 2003 - present International UN official World Day of Safety and Health at Work 29.April 1982 - present International International Day of Dance 29.April United Nations Organisation International UN official Day of Remembrance for all Victims of Chemical Warfare 29.April 1913 - present International funny Zipper Day 30.April 1975 - present Vietnam Victory Day in Vietnam. Saigon was released in 1975 (renamed in Ho Chi Minh). This meant the end of the war and bringing together north to south 30.April United Nations Organisation 2011 - present International UN official International Jazz Day 30.April Mexico Mexico children's day 30.April 1990 - present International funny Honesty Day 30.April International Walpurgis Night, which is, according to legend medieval night where spirits and witches rages on Mount Brocken in Harz Mountains (Germany) 30.April International national National Day of Netherlands |
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