First piece of business is to get the sys date.
After that, it gets easier.
Try this:
::== MAKmyDIR.bat
:: make dir prefixed with ymd
@echo off
cls
setlocal
call :sub1
echo new directory name?
set /p ndn=
md "%YYYYMMDD%%ndn%"
goto :eof
:sub1
:: YYYY getter
> syyyy.d echo a 100
>> syyyy.d echo mov ah,2a
>> syyyy.d echo int 21
>> syyyy.d echo.
>> syyyy.d echo p=100 2
>> syyyy.d echo n sizeYYYY
>> syyyy.d echo w
>> syyyy.d echo q
debug < syyyy.d > nul
:: OK
:: MM getter
> sMM.d echo a 100
>> sMM.d echo mov ah,2a
>> sMM.d echo int 21
>> sMM.d echo mov cx,0
>> sMM.d echo mov cl,dh
>> sMM.d echo.
>> sMM.d echo p=100 4
>> sMM.d echo n sizeMM
>> sMM.d echo w
>> sMM.d echo q
debug < sMM.d > nul
:: OK
:: DD getter
> sDD.d echo a 100
>> sDD.d echo mov ah,2a
>> sDD.d echo int 21
>> sDD.d echo mov cx,0
>> sDD.d echo mov cl,dl
>> sDD.d echo.
>> sDD.d echo p=100 4
>> sDD.d echo n sizeDD
>> sDD.d echo w
>> sDD.d echo q
debug < sDD.d > nul
:: OK
del *.d
for %%F in (sizeYYYY sizeMM sizeDD) do call :sub1 %%F
set /p YYYY=<sizeYYYY.#
set /p MM=<sizeMM.#
if %MM% LSS 10 set MM=0%MM%
set /p DD=<sizeDD.#
if %DD% LSS 10 set DD=0%DD%
del size*.*
set YYYYMMDD=%YYYY%%MM%%DD%
goto :eof
:sub1
> %1.# echo %~z1
goto :eof
:: DONE
NOTE: for anyone else reading along here, this will NOT work in DOS; only NT.
If at first you don't succeed, you're about average.M2