@echo off
For /f "tokens=2" %%i in ('date /t') do for /f "tokens=1,2,3 delims=/" %%j in ('echo %%i') do set AAAA=%%l
For /f "tokens=2" %%i in ('date /t') do for /f "tokens=1,2,3 delims=/" %%j in ('echo %%i') do set JJ=%%k
For /f "tokens=2" %%i in ('date /t') do for /f "tokens=1,2,3 delims=/" %%j in ('echo %%i') do set MM=%%j
For /f "tokens=1" %%i in ('Time /t') do for /f "tokens=1,2 delims=:" %%j in ('echo %%i') do set Heure=%%j%%k
set dateheure=%AAAA%%MM%%JJ%_%Heure%
à ajuster selon le format du date /t