Currently it is possible copy date/time to one or more images in one go. It should be possible to paste a delta date/time from one image to multiple. It should work like this:
You edit the date-time of source photo to be correct
Behind the scenes, the program calculates the delta, e.g. Plus 0 days 1 hour and 12 minutes.
When pasting, the paste-menu should hold a "Date Delta" option in addition to date option.
If user pastes with Date Delta-option, the Date/time of the target photo(s) are shifted with the delta.
Currently it is possible copy date/time to one or more images in one go. It should be possible to paste a delta date/time from one image to multiple. It should work like this: