Originally posted by TonyL Thanks for all the ideas. I will give a try to the LR in grid, and if not I will get ExifTool. ExifTool may be useful for other things too.
If you use the command line version of exiftool, you may have to write a script to also manipulate the date to separate the time of the shot. The are several tags for the date. There is
-DateTimeOriginal, -CreateDate and
-DateTimeDigitized that I'm familiar with.
The argument to these tags is a string in the form, "YY:MM:DD HH:MM:SS" (year:month:day hour:min:sec). In a
bash shell it would look like this:
$ exiftool -DateTimeOriginal='2012:02:26 16:51:00' IMG0001.dng
So you could put all your files you want to change to a given date in a directory and with one command easily change them all (using a wildcard in the file name). However, each picture has a different time. You may want to preserve that information. So that would require first reading the date, split the date from the time, construct a string with new date plus original time and write that to the file. This is easy or hard depending on your level of computer skills in that regard.