Belated thanks for your compliment, xiphophilos, and for your trustfulness, Mike Gann.
Release dates on my list are from the pivotal book 13/14000-D Series (Numerical Listing), Record Handbook No. 1 by Dan Mahony, compiled from the original Columbia Records files and first released in 1961 (Second Edition Revised March 1966).
From late 1924 until the end of 1928, Columbia actually released its records on the 10th, on the 20th and on the 30th (28th in February) of each month.
That list was compiled by fellow mod fixbutte, who is a fountain of knowledge on these things. He probably has researched every single date. Still would love to know what he can tell us.
What is the source of the May 30, 1925 release date for this record? Based on an ad in The Talking Machine World, I was under the impression that Columbia released its records on the 10th and the 20th of each month.