DosTips.com

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:: get the file's date as dd/mm/yyyy
for /f "tokens=1" %%a in ('dir "%folder%\%file%" ^| find /i "%file%"') do set filedate=%%a

:: change the date to yyyymmdd
set date_created=%filedate:~10,4!!filedate:~7,2!!filedate:~4,2!

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In addition, substitution of FOR variable references has been enhanced.
You can now use the following optional syntax:

    %~I         - expands %I removing any surrounding quotes (")
    %~fI        - expands %I to a fully qualified path name
    %~dI        - expands %I to a drive letter only
    %~pI        - expands %I to a path only
    %~nI        - expands %I to a file name only
    %~xI        - expands %I to a file extension only
    %~sI        - expanded path contains short names only
    %~aI        - expands %I to file attributes of file
    %~tI        - expands %I to date/time of file
    %~zI        - expands %I to size of file
    %~$PATH:I   - searches the directories listed in the PATH
                   environment variable and expands %I to the
                   fully qualified name of the first one found.
                   If the environment variable name is not
                   defined or the file is not found by the
                   search, then this modifier expands to the
                   empty string

The modifiers can be combined to get compound results:

    %~dpI       - expands %I to a drive letter and path only
    %~nxI       - expands %I to a file name and extension only
    %~fsI       - expands %I to a full path name with short names only
    %~dp$PATH:I - searches the directories listed in the PATH
                   environment variable for %I and expands to the
                   drive letter and path of the first one found.
    %~ftzaI     - expands %I to a DIR like output line

In the above examples %I and PATH can be replaced by other valid
values.  The %~ syntax is terminated by a valid FOR variable name.
Picking upper case variable names like %I makes it more readable and
avoids confusion with the modifiers, which are not case sensitive.

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rem The four lines below will give you reliable YY DD MM YYYY HH Min Sec MS variables in XP Pro and higher.
for /f "tokens=2 delims==" %%a in ('wmic OS Get localdatetime /value') do set "dt=%%a"
set "YY=%dt:~2,2%" & set "YYYY=%dt:~0,4%" & set "MM=%dt:~4,2%" & set "DD=%dt:~6,2%"
set "HH=%dt:~8,2%" & set "Min=%dt:~10,2%" & set "Sec=%dt:~12,2%" & set "MS=%dt:~15,3%"
set "datestamp=%YYYY%%MM%%DD%" & set "timestamp=%HH%%Min%%Sec%" & set "fullstamp=%YYYY%-%MM%-%DD%_%HH%-%Min%-%Sec%-%MS%"
echo datestamp: "%datestamp%"
echo timestamp: "%timestamp%"
echo fullstamp: "%fullstamp%"
pause

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for /f "tokens=2 delims==" %%a in ('wmic OS Get localdatetime /value') do set "dt=%%a"
set "date-time=%dt:~0,4%-%dt:~4,2%-%dt:~6,2%_%dt:~8,2%-%dt:~10,2%-%dt:~12,2%"
echo date-time: "%date-time%"
pause 

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@ECHO OFF

FOR /f "tokens=1-2 delims=/:" %%a in ("%TIME%") do (set timestamp=%%a%%b)
FOR /f "tokens=* delims= " %%c in ("%timestamp%") do (set timestamp=%%c)

ECHO %date:~-4,4%%date:~-10,2%%date:~-7,2%_%timestamp%_%~n0 >>C:\DOS_TIPS_FORUMS.txt

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:: get the file's date as yyyyMMdd
For /F UseBackQ %%a In (
   `Powershell "(dir '%folder%\%file%').LastWriteTime.ToString('yyyyMMdd')"`
) Do Set MyVar=%%a

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:: get the file's date as dd/mm/yyyy
for %%D in ("%folder%\%file%") do Set "filedate=%%~tD"
           
:: change the date to yyyymmdd
set date_created=%filedate:~6,4%%filedate:~3,2%%filedate:~,2%

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@echo off &setlocal
::Posted: Wed Jul 13, 2016 3:00 am by sal21   
::http://www.dostips.com/forum/viewtopic.php?p=47743#p47743
:: Post subject: convert date in yyyymmdd
::modified: Tue Jul 19, 2016 by thefeduke

Set "folder=%Userprofile%\scripts\testdata"
Set "file=FileDate.txt" 

:: get the file's date as dd/mm/yyyy
for %%D in ("%folder%\%file%") do Set "filedate=%%~tD"
:: change the date to yyyymmdd
set date_created=%filedate:~6,4%%filedate:~,2%%filedate:~3,2%
Echo.File Default date is : %date_created% 

:: get the file's date as dd/mm/yyyy using default write date in dir 
for /f "tokens=1-5" %%A in ('dir "%folder%\%file%" /A-d') do ( 
  if /I "%%E" EQU "%file%" Set "filedate=%%~A" 
)          
:: change the date to yyyymmdd
set date_created=%filedate:~6,4%%filedate:~,2%%filedate:~3,2%
Echo.File Default date is : %date_created% 

:: get the file's date as dd/mm/yyyy using create date in dir 
for /f "tokens=1-5" %%A in ('dir "%folder%\%file%" /A-d /Tc') do ( 
  if /I "%%E" EQU "%file%" Set "filedate=%%~A" 
)  
:: change the date to yyyymmdd
set date_created=%filedate:~6,4%%filedate:~,2%%filedate:~3,2%
Echo.File Creation date is: %date_created% 

Exit /b

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@Echo off&SetLocal
::Posted: Wed Jul 13, 2016 3:00 am by sal21   
::http://www.dostips.com/forum/viewtopic.php?p=47743#p47743
:: Post subject: convert date in yyyymmdd
::modified: Tue Jul 22, 2016 by thefeduke

Set "folder=%Userprofile%\scripts\testdata"
Set "file=FileDate.txt" 

:: Get the date format from registry settings
For /F "usebackq tokens=3 delims= " %%F in (`reg query "HKCU\Control Panel\International"  /V sShortDate`) do Set "sDateFormat=%%F"
Rem.Echo.sDate format: %sDateFormat% 

:: Create date format table for US English 
>"%temp%\%~n0_sDate.txt" ( 
Echo.dd-MMM-yy  Echo 2-digit Year tested 
Echo.yy/MM/dd   Echo 2-digit Year tested 
Echo.yyyy-MM-dd 0 5 8             tested 
Echo.MM/dd/yy   Echo 2-digit Year tested 
Echo.MM/dd/yyyy 6 0 3             tested
Echo.M/d/yyyy   6 0 3             tested
Echo.M/d/yy     Echo 2-digit Year tested 
)

:: Set offsets for date format
Set "OffY="&Set "OffM="&Set "OffD=" 
For /F "usebackq tokens=1-4* delims= " %%D in (`type "%temp%\%~n0_sDate.txt"`) do (
    IF "%%~D" EQU "%sDateFormat%" (
        If /I "%%E" EQU "echo" (
            %%E %%F %%G %%H for setting: %%D 
        ) Else Set "OffY=%%E"&Set "OffM=%%F"&Set "OffD=%%G"
    ) 
)
If NOT Defined Offy (Echo.Unexpected date format.&Exit /b 1 ) 

:: get file's date in regional format using create date in DIR command
for /f "tokens=1-5" %%A in ('dir "%folder%\%file%" /A-d /Tc') do ( 
  if /I "%%E" EQU "%file%" Set "filedate=%%~A" 
) 
           
:: change the date to yyyymmdd using custom offsets for date format 
setlocal enableDelayedExpansion
set date_created=!filedate:~%OffY%,4!!filedate:~%OffM%,2!!filedate:~%OffD%,2!
Echo.File Creation date is: %date_created% 

Exit /B