I have given up on time zones and watches, and just usually open conversations with, "What time is it by you?"
Thank heavens, my cell phone is always on local time - it sets itself by the towers, as soon as the plane lands.
i didn't find it difficult to adjust to MT time, for some reason the 2 hours was much easier than the 3 for CA. and i kept my watch on EST bc it wasn't worth changing it for a week and the condo and the SUV both had clocks with local time on it. changing planes in between was the only complication.