I am from UK and going to Florida USA this spring. This will be first time I travel abroad with bigger time zone difference (I did France twice but it only 1 hour difference so no issues there). UK to USA should be okay I think since going back in time 5 hours. Problem is USA to UK lose 5 hours. My flight is in early evening and arrive UK next day late morning. Flight is bit over 8 hours I think. It is my stand rings I am worried about because 12 hours stand. So if I closed all my rings on day I am leaving in USA before I get on plane to UK and change timezone to UK on plane will that help me get my 12 hours stand or leave it automatic? I am trying to work out to avoid my perfect streak (at moment it is 1,604 days).