This is a way of getting a DateTime string independent of localization:
for /f "tokens=1 delims=." %%i in ('wmic os get localdatetime^|find "."') do set dt=%%i
This is format YYYYMMDDHHMMSScc
You can shorten this string to your needs. for example:
set dt=%dt:~0,8%
will set it to YYYYMMDD
only.
set dt=%dt:~0,12%
will set it to YYYYMMDDHHMM
Then you can copy like this:
xcopy "\MY_SERVER_IP\SharedDRIVE\TEST*" "C:\Test_Folder_%dt%" /D /E /C /I /H /Y