UN Chinese Language Day
UN Chinese Language Day is held on April 20. United Nations. This event in the second decade of the month april is annual.
World Bicycle Day on April 19 (The events of the first LSD trip in April 19, 1943, now known as “Bicycle Day”, after the bicycle ride home, proved to Hofmann that he had indeed made a significant discovery: a psychoactive substance with extraordinary potency, capable of causing significant shifts of consciousness in incredibly low doses);
International Girls in ICT Day on April 22 (aims to encourage and empower girls and young women to consider studies and careers in the growing field of Information and communications technology);
UN English Language Day on April 23 (United Nations);
UN Spanish Language Day on April 23 (United Nations);
International Pixel-Stained Technopeasant Day on April 23 (The Day is declared by author Jo Walton, held on April 23 and first celebrated in 2007, in response to remarks made by Howard V. Hendrix stating that he was opposed "to the increasing presence in our organization the Science Fiction and Fantasy Writers of America of webscabs, who post their creations on the net for free". The purpose of the day, according to Walton was to encourage writers to post "professional quality" works for free on the internet. The name of the day originates from the assertion by Hendrix that the "webscabs" are "converting the noble calling of Writer into the life of Pixel-stained Technopeasant Wretch.");