Chauncey Addison Day, better known as Chon Day, (April 6, 1907 – Jan 1, 2000) was an American cartoonist whose cartoons appeared in The New Yorker and other magazines. Born in Chatham, New Jersey, Day attended Lehigh University in 1926, where he drew for the college's humor magazine, The Burr. After one year, he left and later enrolled in 1929 at New York City's Art Students League, where he studied under Boardman Robinson, George Bridgman and John Sloan. That same year his cartoons were first published in national magazines.