So I've been digging into my Google Analytics data a little more trying to figure out why my RPM has dropped. One thing I've noticed that is very weird. In AdSense I can choose EST for my Time Zone which shows as GMT-4. When I look at Analytics time zone setting it shows EST as being GMT-5. I think this might account for different values I see when comparing AdSense data like page views to GA data.
So, how to fix? Do I change GA to some other country where GMT-4 is an option? Or do I change AdSense to CST so it matches GA of GMT-5?