Certainly not the same as Explorer’s, it seems.
Windows Explorer General:
Windows Explorer Details:
Writer:
https://help.libreoffice.org/25.2/en-US/text/shared/01/01100200.html
File Properties
Modified
Displays the date and time and author when the file was last saved in a LibreOffice file format."
it’s maintained by LO in the document, independantly from move/copy over filesystems.
see meta.xml → XML File Formats
How do I get document information from the command line? - #6 by magicfab
etc …
So does “Displays the date and time and author when the file was last saved in a LibreOffice file format” refer to last saved by LO?
from just a logical pt of view would be too restrictive.
can have been saved by another app conforming to ODF, other format with metadata.
Aha. That would seem to make " in a LibreOffice file format ”" meaningless - at best.
I just created a new .DOCX in MS word. Explorer says
Writer properties says:
you got the idea;
now very welcome to test, and report problems or enhancements.
some are long time pending 65209 – FILEOPEN: MS Word document properties creation times etc. time zones not preserved/displayed 
but probably not worth trolling if it’s just to ignore underlying context/complexity.
e.g. Are Windows file timestamps timezone aware? - Super User
and for reference, just created a docx :
and FS says :
Access: 2025-09-02 21:37:12.999690543 +0200
Modify: 2025-09-02 21:37:08.095952150 +0200
Change: 2025-09-02 21:37:08.095952150 +0200
Birth: 2025-09-02 21:37:08.094662742 +0200
I see now we probably cannot say whether Writer’s Modified and Created are supposed to show the corresponding file system properties, so I’ll just … stop thinking about it.
Thanks.