Not an answer I'm afraid, but two suggestions.
1) A directory listing will give you the time of the last change (
ls -l[/m] for *NIX, [m]dir something for Win).
2) Look in the
meta[/m] directoy and you'll find two or three files corresponding to each page in the wiki. Look in the [m].changed file and you'll see a simple listing of each change. The first field is the date*, not sure about the next (mine seem to always be ::1), the C for created, E for edited, the path to the page, the user and finally the comment.
*The date field is the number of seconds since system zero. Use
date(1) to convert:
$ cat start.changes
1498084488 ::1 C bells:start martinr created
1498861751 ::1 E bells:start martinr Hook for new set
$ date --date='@1498861751'
Fri 30 Jun 23:29:11 BST 2017
Which shows that this file was last edited on 30/6/2017. I'm sure a grep script of a bit of Perl/python/php will give you your report.