Simple Locale Dependent Method
xcopy "c:\Report_Folder\Reports\Report Data %Date:~12,2%%Date:~4,2%%Date:~7,2%.xlsx" "U:\target\Reporting Data File\"
Locale Independent Method
@echo off
for /f "delims=" %%a in ('wmic OS Get localdatetime ^| find "."') do set dt=%%a
set datestamp=%dt:~2,6%
xcopy "c:\Report_Folder\Reports\Report Data %Datestamp%.xlsx" "U:\target\Reporting Data File\"
Options are to Parse these (see above)
wmic OS Get localdatetime
or
wmic Path Win32_LocalTime get /value