BrianK90: Clearly I didn't explain the problem correctly. The problem involves the implementation of Finder in the macOS Ventura 13.x releases. Finder does not consistently apply one's date format when displaying directories.
I don't need instructions on how to set date formats. I have been doing it for over 40 years in RSX, IAS, VMS, Unix, Linux, Mac X, and macOS as I dealt with government customers around the world.
When I put my home directory in Finder's sidebar and click on it, the directory is displayed correctly using the date format that I specified in System Settings. I can switch between the three ISO 8601 date formats offered in macOS: YYYY.MM.DD, YYYY/MM/DD and YYYY-MM-DD. Finder will display my home directory using whatever date format I choose. If Finder is open and displaying my home directory when I switch formats, Finder changes the display to the selected date format.
The problem is that if I select any link in the sidebar other than my home directory, Finder changes the date format to April dd, YYYY or APR dd, YYYY. The second format is only used when I select the link to my Finance directory in the sidebar. All other links in the sidebar use the first format.
When my home directory is being viewed in Finder, I can click on the > next to any subdirectory and the dates are displayed in the ISO 8601 date format that is currently active. However, if I click on the subdirectory name and display it in a new tab, the dates are no longer displayed in the selected ISO 8601 date format.
This inconsistent behavior seems to be a product of the macOS Ventura 13.x releases.