@echo off
For /f "tokens=1-3 delims=/." %%a in ('date /t') do (set mydate=%%a/%%b/%%c)
For /f "tokens=1-2 delims=/:" %%a in ('time /t') do (set mytime=%%a:%%b:00)
echo [date] >TAG.txt
echo %mydate% >>TAG.txt
echo %mytime% >>TAG.txt