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fjkaykr11
 asked on

batch file rename date

On Windows Server 2003
The following batch file below will rename a file called: filename.txt
to filenameDate.txt
*where date = todays date and is displayed as
    MMDDYYYY (MM=Month DD = Day YYYY = year)

::BATCH FILE
@echo off
set today=%date:~4%
for %%a in ("filename.txt") do ren "%%~a" "%%~na%today:/=%%%~xa"
::END BATCH

The batch file runs daily and will always rename the file to the today's date.
I need to display the date as YYYYMMDD  (year month day)  instead of MMDDYYYY.
so the file will be renamed filenameYYYYMMDD.txt.   Any ideas on how to do this?  Thanks.
Windows BatchScripting Languages

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Last Comment
Qlemo

8/22/2022 - Mon
SOLUTION
Qlemo

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Steve Knight

I can't post a link at the mo. Because on mobile but I have written an article here on how to do such things.   Using %date%a variable is pretty unreliable as the date format can be all sorts of things, and at the moment your says to take 4 chars off the beginning and then change any /adding chars to -.  It wont add 0's when it is 1 March say and if the date doesnt have week day at start more issues...

So personally I nearly always use a one line vbscript in the batch file.  Really easy to do and 100% reliable as VBscript does dates natively.

If you click on my dragon-it link you should be able to see the article details.  There are examples in there to get you any date and time format you want.

Steve
ASKER CERTIFIED SOLUTION
tdlewis

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fjkaykr11

ASKER
@qlemo.  I get an error when trying to run your batch file:
error:
The following usage of the path operator in batch-parameter
substitution is invalid: %~xa"
fjkaykr11

ASKER
@TDLewis.  Thanks for  your reply. When I try your method:

@echo off
set today=for /f "tokens=2-4 delims=/ " %%a in ('date /T') do set year=%%c
for /f "tokens=2-4 delims=/ " %%a in ('date /T') do set month=%%a
for /f "tokens=2-4 delims=/ " %%a in ('date /T') do set day=%%b
set today=%year%%month%%day%
for %%a in ("filename.txt.txt") do ren "%%~a" "%%~na%today:/=%%%~xa"

The file gets renamed but not with the year.  I get the following
filename1226.txt    I need it to be renamed to filename20121226.txt for today's date.
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SOLUTION
tdlewis

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fjkaykr11

ASKER
@tdlewis when I run the command date /T
I get:
 Wed 12/26/2012
fjkaykr11

ASKER
@tdlewis:  
When I add the four lines in to the batch file:
echo year: %year%
echo month: %month%
echo day: %day%
echo today: %today%

I get back
year:
month: 12
today: 1226
SOLUTION
tdlewis

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fjkaykr11

ASKER
that worked, fantastic!. Thanks.
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Steve Knight

You see my point then perhaps about why not to use date /T or %date% .... different machine, different user, language, date format (ddd dd/mm/yyyy, mm/dd/yyyy etc. And it breaks.
Qlemo

Dragon is correct about the fragile usage of %date% and date /t. In a restricted environment it works as expected, but it might not work on other machines.

My code was only missing one out of 3 percent signs:
@echo off
REM %date% is ddd, mm/dd/yyyy
set yyyymmdd=%date:~-4%%date:~-10,2%%date:~-7,2%
for %%a in ("filename.txt") do ren "%%~a" "%%~na%yyyymmdd%%%~xa"

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