Cartoonists Day
Cartoonists Day is held on May 5. They were the favorite part of the morning paper for many of us growing up. This event in the first decade of the month May is annual. 
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Today, we most commonly use the term cartoon to refer to 'a comical drawing,' 'comic strip,' or 'animated film or television show,' yet its roots in English dates back to the fine arts. Cartoon characters are extremely popular among children all around the world. Cartoonists may work in many formats, such as animation, booklets, comic strips, comic books, editorial cartoons, graphic novels, manuals, gag cartoons, graphic design, illustrations, storyboards, posters, shirts, books, advertisements, greeting cards, magazines, newspapers, and video game packaging.
The founder of Playboy (Hugh Hefner) was a failed cartoonist (he enrolled in a figure-drawing course at the Art Institute of Chicago). He was honored by the National Cartoonists Society in 1963 with the Ace Award, “given to a celebrity or notable who at one time aspired to be a cartoonist but whose path led them to an entirely different career.”
Similar holidays and events, festivals and interesting facts
Coal Miners Day in India on May 4
Steelworker's Day or Metallurgist's Day in Poland on May 4 (Metal and Mining Workers' Day);
World Naked Gardening Day on May 4 (celebrated on the first Saturday of May);
Free Comic Book Day on May 4 (Held on the first Saturday in May);
Join Hands Day on May 4
Petite And Proud Day on May 4
Renewal Day on May 4
Star Wars Day on May 4 (International observance);
Orthotist and Prosthetist Day in El Salvador on May 5 (Día del ortesista y protesista);
World Laughter Day on May 5 (was created in 1998 by Dr. Madan Kataria, founder of th worldwide Laughter Yoga movemen);
Cinco de Meow Day on May 5
5.25" Floppy Day on May 5 (#525FloppyDay);
National Nursing Week in Canada on May 6 (Held from Monday to Sunday of the same week in which the date May 12 is located);
National Meeting Planners Day in US on May 6 (Happens yearly on Monday of the 1st full week of May);
Infantry Day in Ukraine on May 6
Teacher Appreciation Week in USA on May 6 (Begins on the first Monday of May);
Engineer Cartographer Day in Brazil on May 6
Kinesiologist's Day in Chile on May 6
No Homework Day on May 6 (this is the day where children can tell their teachers and parents in complete honesty that they will not be doing their homework, in order to mark this special day);
Coloring Day on May 6