Kaye Daye was a mystery writer and part of the Mystery Analysts of Gotham City.
Daye was eventually threatened after she won a prize for one of her novels and she was saved by the members of the Mystery Analysts, who discovered that the killer was Fern Hunter, Kaye's own cousin, who wanted to claim the inheritance money left to Kaye by their late grandfather.
During the last meeting of the Mystery Analysts, Daye found the man responsible for a murder, but was captured by the culprit. She was eventually saved by Batman and after the case was solved, the group dissolved.
- This version of Kaye Daye, including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 14 Appearances of Katherine Daye (Earth-One)
- 4 Images featuring Katherine Daye (Earth-One)
- Quotations by or about Katherine Daye (Earth-One)
- Character Gallery: Katherine Daye (Earth-One)