I’d like to add the compilation date and Therion version to map and atlas headers after the statistics/copyright and before the legends. 

This is probably a simple tex macro for someone to extract the information from suitable variables or the system clock for someone that knows how.

Eg

(c) Bilbo Baggins 2012

Compiled with Therion 5.3.8 on 2012.01.05  (optional time, bat logo from web site and http://therion.speleo.sk link here)

Legend…

Is it (easily) possible?  Has someone done this already?

Come to think of it all of the list outputs should include this information as well.

Bruce