by glennrp » 2012-04-14T04:36:41+00:00
Which timestamp are you referring to? There is the system's timestamp that you see when you list a directory, there is a date:create property, and probably an internal timestamp inside the EXIF property. Assuming you are talking about the first, that's outside of the scope of ImageMagick. On a Linux system you'd use "touch". I don't know what is the Windows equivalent but I'm sure there is one.