how can I change the default name of safari “print to pdf” documents? Saving prints of particular website to track changes.  Would like to change the name of the saved pdf file to reflect time*date when I did the pdf print instead of just the webpage name.  (e.g. XXDashboard-2017-10-12-13-02 )
TIA
I guess you could automate the job using an Automator script.
Automator is nbuilt right into Mac OSX, so you don't have to install anything.

Here is a tutorial on how to automate some tasks:
https://www.raywenderlich.com/58986/automator-for-mac-tutorial-and-examples