The example I gave turns into one hell of a long day! Sunrise in Beijing at 6 am or so. My flight leaves at 3pm, still daylight of course. Flight lasts 12 hours, all daylight. Arrive in New York around the same time I left, 3 pm (like I was existing outside of time on the plane, which sounds about right cuz it feels like forever) From there I head to Maine, finally getting home around 7 pm - just in time to watch the Sun set. (date has not changed) Sunrise to Sunset = 25 hours! <br /><br />Of course that's just a rough calculation. It's hard to remember things precisely that occured under the influence of jetlag.<br /><br />Returning to China is worse, as it thrusts me into the future, and I can never figure out if I'm arriving on the same day I leave New York or the next one.<br /><br />But one nice thing about a 12 hour time difference is that I never need to reset my watch, either way.<br /><br />