There's not a lot of actions that can be done using the existing album bulk edit feature.
I'd use zenphoto's interface to change the albums' date, if the number of albums to be changed is not a lot, but I need to change the date for more than 40 albums, and it's a drag to load each album info page individually and change it there. I thought maybe someone else has experiencing in doing it.
Incidentally, the edit images page loads very slowly and is not very ui-friendly (too many text fields, starts getting even more complicated if additional languages are set e.g. I need to scroll *within* the text field itself for image title and description). Would be better if zenphoto would allow me to edit just a single photo that I select, without loading the other 9, 19, 29, etc. photos.
Other cms that I've used have bulk edit options that is simple, with a quick edit area to change certain basic data. Additional functionality (e.g. more complex data manipulation) can be done using plugins. Maybe this can be done with zenphoto, if the developers are worried about adding bulk to the core code.
I'll open a ticket later for a feature request and suggestion for UI improvement