Need a CSL style that uses the month field in Bibtex

This isn’t strictly speaking a LaTex question, but I moved this over on a suggestion from Academia SE since it seemed like a better fit here….

I do a lot of academic writing where I need to cite magazine and newspaper articles. My workflow is to write in Markdown / Org-mode and then export to docx using pandoc. So I use the citation facility provided by pandoc-citeproc to generate my bibliography from an old BibTex file that I’ve been using for many years.

I know that standard BibTex doesn’t support newspaper articles directly, so for years I’ve been using the kludge mentioned here and adding the day to the month field. This has worked fine for several years. But over the last several months I’ve been running into problems – the standard default csl format for pandoc-citeproc drops the month field entirely when producing the bibliography. The same happens with apa.csl, chicago-author-date.csl, and several other styles I’ve tried from the CSL Library.

I don’t want to manually rewrite the hundreds of entries in my BibTex file. Is there a CSL file that will include the month information in the bibliography entries? Is there another way to get that information easily?