> You are far better and more experienced in maintaining widely used opensource codebases so I wouldn't argue with you, but... :)

Well, if a change introduces a problem, it will be my lookout, won't it? Just as the original patch for bpo-8117 is proving to be :-)

OK, how about this? We update the PR to add a new use_ctime=False keyword argument to TimedRotatingHandler.__init__(). If nothing else changes, the behaviour is as it is currently. If use_ctime=True is passed in the instantiation, then the constructor will use CTIME rather than MTIME. Will that work for you? I'd be OK with that approach.