America Day is held on April 14. Día de las Américas (es) with the support of the Organization of American States. This event in the second decade of the month april is annual.
Global Day of Action on Military Spending on April 12 (The day was originally proposed by the International Peace Bureau and the Institute for Policy Studies with the aim of promoting a common awareness of the amounts of money spent on military);
International Moment of Laughter Day on April 14 (is focuses on laughter as a way to de-stress);
Malbec World Day on April 17 (Malbec is a purple grape variety used in making red wine. MWD is celebrated to commemorate the day when president Domingo Faustino Sarmiento of Argentina officially made it his mission to transform Argentina's wine industry. On that day, back in 1853, he tasked Michel Aimé Pouget, a French soil expert, to bring over new vines);
World Amateur Radio Day on April 18 (Every April 18, radio amateurs worldwide take to the airwaves in celebration of World Amateur Radio Day. It was on that day in 1925 that the International Amateur Radio Union was formed in Paris);