Thanks, but that does not help.

On Windows 11---  I can get to Change Regional Format; however, there are only four choices under that category:

1.  Date and Time

2.  Language and Region

3.  Typing

4.  Speech

 When exploring options in each of these four categories, none of them have any option for "Change Formats" or anything at all referencing changing the format of dates or times.

Other ideas?