Earth-12 contains many humor characters from DC Comics, Quality Comics, Fawcett Comics, Charlton Comics, and Fox Features. While it is possible that these characters exist in different humor-based dimensions, it's still worthwhile to place them all on the same timeline.
Not all humor characters exist on Earth-12, however, since several humor series exist more or less in a realistic setting. Humor characters who live in fantastical settings, interact with fantasy characters, and/or use parodies of existing characters or people probably exist in the Earth-12 universe, rather than in one of the more realistic universes such as Earth-1 or Earth-2. Humor characters who appear in short gag-based strips (rather than story-based strips with humor) are also most likely based on Earth-12. We have done our best to categorize characters based on the above criteria.
This timeline began as Mikel Midnight's Earth-12 timeline and will be expanded and revised in time to more closely fit within the Five Earths Project. Please note that Earth-12 typically contains contradictory histories and timelines, so any of the events below may be ignored or revised in other stories, and should be considered as placeholders.