Global Day of Action on Military Spending

International Louie Louie Day is an annual holiday dedicated to Richard Berry's famous song Louie Louie on April 11;

International Moment of Laughter Day on April 14 (is focuses on laughter as a way to de-stress);

America Day on April 14 (Día de las Américas (es) with the support of the Organization of American States);

World Art Day on April 15;

Universal Day of Culture on April 15;

International Biomedical Laboratory Science Day on April 15 (is celebrated annually on 15 April to promote and acknowledge the role of biomedical laboratory professionals in diagnostic and preventative healthcare organisations);