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How can I modify the date of file creation in Photoshop? I don't need any specific date, "today" will be okay. Is there any other meta-information stored in .psd files apart from what I can see in File->File info?

Edit: It's not about the file creation time, .psd has its own date stored somewhere in the file.

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3 Answers

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There are 2 ways to change the modification/creation meta data. From the file-system's perspective and within the file's metadata.

1. Changing file-system modify/create date/time

Windows

Depending on your OS, windows you can use a tool such as File Cosmetic or Finders Keepers. See this page for more of them.

File Cosmetic

                                    ss file cosmetic

Finders Keepers

                           ss finders keepers

MacOSX

You can use the touch command (man page), similar to other unixes.

For example:

% touch afile
% ls -l afile
-rw-rw-r-- 1 saml saml 0 Jan 23 22:31 afile
% touch -m -t 198001010000 afile
% ls -l afile
-rw-rw-r-- 1 saml saml 0 Jan  1  1980 afile

2. Changing the modify/create date/time within file's metadata

Commandline

You can use the commandline tool, exiftool, to manipulate metadata within various file types such as TIFF & PSD.

DateTimeOriginal before

% exiftool '-DateTimeOriginal' -f j.psd 
Date/Time Original              : 2009:05:31 08:32:08

Change the date time

% exiftool -overwrite_original "-DateTimeOriginal=1981:07:01 00:00:00" j.psd 
    1 image files updated

DateTimeOriginal after

% exiftool '-DateTimeOriginal' -f j.psd 
Date/Time Original              : 1981:07:01 00:00:00

NOTE: Further exiftool resources such as the main site & forum.

GUI

You can use the GUI on Windows, ExifToolGUI, to make the same types of changes.

ss of ExifToolGUI

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Similar to how camera JPG photos store EXIF tags about date picture was taken etc., PSD files too can contain lots of metadata in various formats, such as Photoshop-specific tags, IPTC tags, EXIF tags, XMP tags and so on. None of these have anything to do with file attributes such as date created/modified/accessed. –  Karan Jan 27 '13 at 18:28
    
As per his query about "any other meta-information", it seemed clear to me the date bit was also metadata he wanted to edit. But yeah, can probably update if he ever cares to return. –  Karan Jan 27 '13 at 18:40
    
Well, I've changed the operating-system-type creation date, but it's still the same in Photoshop. I'd be very grateful if anyone could answer my question. –  Matt Jan 28 '13 at 0:24
    
In case you're scared of the command line: there's exiftool GUI also. –  Matt Jan 28 '13 at 1:14
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Photoshop uses XMP format to store its metadata (like creation date). Here's a list of software that can modify it:

http://en.wikipedia.org/wiki/Extensible_Metadata_Platform#XMP_support_and_acceptance

But I've found it easier to just duplicate all the layers to a new file.

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You need a program to change the file date. There is an app called "NewFileTime" that will change the date for you How to Change the Timestamp & Datestamp of your Files in Windows

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