How to know when the sysprep image applied to computer?

I did a very simple script, and I run it once when I apply a new sysprep image, that imports the date, when this particular image was applied to the specific computer. Sometimes this is very important. Here is a content of my script:
@Echo Off
REM **********************************************************************************************************
REM * This script checks a date Image was deployed and import this data into the Registry as Image-Date REM REM **********************************************************************************************************
For /f “Tokens=2 Delims= ” %%a in (‘@DATE /t’) do set IMG-DATE=%%a
Echo Windows Registry Editor Version 5.00 > %TEMP%\IMG-DATE.reg
Echo [HKEY_LOCAL_MACHINE\SOFTWARE\WRHA] >> %TEMP%\IMG-DATE.reg
Echo “Image-Date”=”%IMG-DATE%” >> %TEMP%\IMG-DATE.reg
Reg.exe import %TEMP%\IMG-DATE.reg
Del %TEMP%\IMG-DATE.reg /Q
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