Today in the history of the American comic strip: September 27

American cartoonists and writers may not have invented the comic strip, but some argue that the comics, as we know them today, are an American creation. Clearly, the United States has played an outsize role in the development of this underappreciated art form.

9.27.1931: Tarzan, an adaptation of the Edgar Rice Burroughs novels, expands by adding a Sunday strip to the daily comic, which lauched in 1929.

9.27.1948: The Saint debuts as a daily comic strip based on the novels and short stories by Leslie Charteris, who wrote the early strips in collaboration with artist Mike Roy. Other cartoonists eventually replaced Roy.
 

Tarzan

Most of the information listed here from one day to the next comes from two online sites -- Wikipedia, and Don Markstein's Toonopedia -- as well as 100 Years of American Newspaper Comics, edited by Maurice Horn. Note that my focus is on American newspaper comic strips (and the occasional foreign strip that gained popularity in the United States). Thus, comic books and exclusively online comics are not included here.