@echo off
for /f "tokens=1-6 delims=/ " %%a in ('doff ss/mi/hh/dd/mm/yyyy') do (
set ss=%%a
set mi=%%b
set hh=%%c
set dd=%%d
set mm=%%e
set yyyy=%%f)
echo The time is %yyyy%%mm%%dd%%hh%%mi%%ss% >> c:\log.txt