@echo off
>"sDate.vbs" echo dt=Date()
>>"sDate.vbs" echo ymd=right(Year(dt),4)+right(Month(dt),2)+right(Day(dt),2)
>>"sDate.vbs" echo wscript.echo ymd
for /f %%a in ('cscript /nologo "sDate.vbs"') do copy myBat.bat myBat_%%a.log
if exist sDate.vbs del /q sDate.vbs
pause