Yeah, it looks like various interests simply lobby for the time convenient to their own industry. Nevada is indeed more into Pacific than Mountain -- in fact,

Yeah, it looks like various interests simply lobby for the time convenient to their own industry. Nevada is indeed more into Pacific than Mountain -- in fact, the whole of Nevada and some part of Utah should be within the Pacific if we're looking for the best alignment. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6692659/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6692659/ -- and specifically https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6692659/figure/F1/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6692659/figure/... -- provides maps which show the best longitude-based alignment for the timezones, and Nevada is entirely within the Pacific portion. Isn't the US a bit too wide to have a single timezone? They've tried it in Russia in 2010s, to skip a few "extra" timezones, because 11 total timezones is quite a bunch as-is, but, apparently, the folks weren't all too happy about it, and the change was reverted several years later.