This might seem like a stupid question, but now that most of the world is connected by computers, smart phones, etc... why don't we develop an app that collects time settings and standards along with GPS for every device world wide as to what is showing on the clock? Such an app could then automatically generate zone rules along with location data for each of those rules. It would be a complex exercise in set theory getting the program to recognize "groups" of similar data but I think it could be done.