echo YOU MUST CHECK THE DATE FORMAT BEFORE SAFE-RUNNING THIS!
echo EDIT THIS FILE WITH NOTEPAD. AFTER DOING SO, DELETE THE
echo LINES AS EXPLAINED INSIDE THE CODE, IN THE REM LINES
echo RUN THE CMD WITH THE /V OPTION TO LET THIS STUFF WORK:
echo CMD /V
goto :EOF
rem From The Beginning Untill here You Can DELETE: First Line Is Next One
@echo off
rem Then You can Safely Remove every Line Beginning With Rem, that is a
rem comment, or REMark. At The End of The File you Find Several Remarks
rem with Code Lines. You Can Change Lines Inside the GET+DATE START/END
rem Remark group to fit the Need of your System. This is all you Can Do
rem With this stupid Command Line Interpreter:) Or At Least is What *I*
rem Can Do.
pushd %1
set myrand=%random%
for %%i in (*) do @(
  @echo @set nnxy=^^>temp%myrand%.bat
  @dir /t:c /n /4 /-c %%i |findstr "^[0-9]" >>temp%myrand%.bat
  @.\temp%myrand%.bat
  rem GET DD/MM/YYYY DATE START
  @set day=!nnxy:~0,2!
  @set month=!nnxy:~3,2!
  @set year=!nnxy:~6,4!
  rem GET DD/MM/YYYY DATE END
  @set thefile=!nnxy:~39!
  @set thefile=!thefile: =_!
  @rename %%i !year!^!month!^!day!_!thefile!
)
del temp%myrand%.bat
popd
rem GET MM/DD/YYYY DATE START
rem @set day=!nnxy:~3,2!
rem @set month=!nnxy:~0,2!
rem @set year=!nnxy:~6,4!
rem GET MM/DD/YYYY DATE END
rem GET YYYY/MM/DD DATE START
rem @set day=!nnxy:~8,2!
rem @set month=!nnxy:~5,2!
rem @set year=!nnxy:~0,4!
rem GET YYYY/MM/DD DATE END
rem It ain't so hard, Try Yourself if All those do not fit You.