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.
Sljedećih četvrt stoljeća je ovo funkcioniralo kao The World Calendar Association, Inc. Tijekom 1930-tih, podrška konceptu je rasla u Ligi naroda, prethodniku Ujedinjenih naroda.