It functioned for most of the next twenty-five years as The World Calendar Association, Inc. Throughout the 1930s, support for the concept grew in the League of Nations, the precursor of the United Nations.
Organisationen fungerede de næste godt 25 år som The World Calendar Association, Inc. Igennem 1930'erne voksede støtten til den nye kalender i Folkeforbundet, forløberen for De Forenede Nationer.