How to take into account the reset of the system time?

Question

Data archiving

Good day.
There is a backup script:

@Echo Off

echo %date% %time% ***Start***

SetLocal EnableDelayedExpansion

Set $SRC=list_add.txt

Set $EXC=list_excl.txt

Set $DIR=C:\backtest

Set $PSW=1

Set $COMPR=5

Set $COPIES=7

C:\"Program Files"\7-Zip\7z.exe a -t7z "%$DIR%\file%DATE:~-4%-%DATE:~3,2%-%DATE:~0,2%_%TIME:~0,2%-%TIME:~3,2%-%TIME:~6,2%.7z" @%$SRC% -scsWIN -p%$PSW% -mx=%$COMPR% -ssw [email protected]%$EXC% >> log_7z.log

For /F "Delims=" %%i In ('DIR /B/O:-N %$DIR%\file????-??-??_??-??-??.7z') Do (

Set /A $COPIES-=1

If !$COPIES! LSS 0 DEL "%$DIR%\%%i"

)

echo %date% %time% ***End***

If the system date jumps forward - it overwrites old files, everything works. But if the date is rolled back, the script stops deleting files. And you need to write anyway, despite the date.