Not just the after-trip feelings, but things started being a little weird as soon as we crossed the second time zone going out. Being our first time so far west, after so many years on the east coast, we both realized we felt strange the first few evenings on the road and realized it seems to stay light way longer out there.
It was more than just felling like it's 10PM while local time was only 8PM, but more like feeling the sun was still too far up to be 8pm -- like the quality of light that time of evening was more in the 5 or 6PM range. We figured part of it is the whole "big sky" thing as we are used to surrounding mountains / hills being more "close in". Sure seems like you can see 2 or 3 times farther out to the horizon and teh air is much clearer...maybe the lower humidity helps.