Using the power of the magic dates, Sir Hokus regains his youthful form and vacates the Emerald City to rule as Prince of Corumbia, with Marygolden becoming his Princess.

[2] In 1962, Sacramento theater manager Richard Fullmer obtained permission from Thompson, publisher Reilly & Lee, and the Baum estate to adapt the book.

Fullmer's version was premiered at the Sacramento Civic Theater in February 1963; it blended live actors with puppets for non-human characters like the Comfortable Camel.

In John R. Neill's Oz books written in the early 1940s, Hokus is back to his original self, with no mention of Corum the Yellow Knight.

Under current understanding of United States copyright law, The Yellow Knight of Oz and all its characters are expected to enter the US public domain on January 1, 2026.