Image viewer - button to toolbar - copy shooting date to clipboard

Whilst viewing an image I would like to copy the shooting date dd-mm-yyyy hh:mm to clipboard?
Just that, nothing more.
There is a script that copies data to clipboard. Thread title : How to copy basic file properties to clipboard?

However, I lack the knowledge to change that in a sense that it only copies the date stamp taken from the exit data (currently it copies the modified date and some other file properties)

Any suggestions?