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
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.