I have had my iPhone 6s since November 11, 2015 and a few days ago when I turned it on I saw something weird, the time was an hour back. I'm not sure how that happened because I never made any changes to it in the settings, however I was able to fix it and have the correct time. So did this happen because in a week we will be setting our clocks back an hour or was it some other reason? It's the only explanation I can think of, however when we would set our clocks an hour ahead my 6s did it automatically.