Compare 2 dates in a batch file

Question

I am using this to get the date modified of a file:

@echo off
FOR %%? IN (\"C:\\some.exe\") DO (
    ECHO Last-Modified Date   : %%~t?
)

Th

Answer 1

@ECHO OFF
SETLOCAL
:: No doubt for international use, this could be retrieved from the registry
SET monthnames=Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
:: get last modified date of target file - your format as specified
:: (I used THIS BATCH FILE)
FOR %%i IN ("%~f0") DO SET target=%%~ti
:: parse the target date
FOR /f "tokens=1-3delims=/ " %%i IN ("%target%") DO SET targetf=%%k%%j%%i
::
:: parse name from 'other file'
SET other=23-Sep-13.exe
FOR /f "tokens=1-3delims=.- " %%i IN ("%other%") DO SET od=%%i&SET omn=%%j&SET oy=%%k
:: Convert monthname to number
:: @ECHO on
SET om=101
FOR %%i IN (%monthnames%) DO (
IF DEFINED omn IF /i %omn%==%%i (SET omn=) ELSE (SET /a om+=1)
)
:: Build date of 'other file' in same format (YYYYMMDD)
SET otherf=20%oy%%om:~-2%%od%
ECHO is %other% later than %target% ?
ECHO IF %otherf% gtr %targetf% GOTO later
ECHO.
::
:: parse name from 'another other file'
SET other=23-Jan-13.exe
FOR /f "tokens=1-3delims=.- " %%i IN ("%other%") DO SET od=%%i&SET omn=%%j&SET oy=%%k
:: Convert monthname to number
SET om=101
FOR %%i IN (%monthnames%) DO (
IF DEFINED omn IF /i %omn%==%%i (SET omn=) ELSE (SET /a om+=1)
)
:: Build date of 'other file' in same format (YYYYMMDD)
SET otherf=20%oy%%om:~-2%%od%
ECHO is %other% later than %target% ?
ECHO IF %otherf% gtr %targetf% GOTO later
ECHO.

Code takes date of (this batch) as the target (your 'C:\some.exe'- change to suit.

test then applied to two different filename-is-date+ext format filenames to test.

Can be easily adjusted if comparisons to 20th-Century date is required... :)