On a very similar issue as yesterdays post. When location stamping photos it might be necessary to time-shift a large number of photos due to the clock in the camera was not correctly set. There are a number of tools to do that. I have not yet found a free graphical user interface for doing it but both ExifTool by Phil Harvey and JHead are free command-line tools. I have only used JHead so far but ExifTool can manage many more file-formats than JHead.
For EXIFTool there exists a Photoshop plugin, but I have not yet tried it.
And while writing up upon the subject on geotagging images, found this other tool called JPhotoGeoTagger that can be used to geotag images.
