Probably not. An indication of the historical complexity of US time zones is that bedside companion of all serious astrologers, a set of 3 books by Doris Chase Doane:
Time Changes in the US Time Changes in Canada and Mexico Time Changes in the World
of which the first is by far the thickest and most complex. History is by no means over, though.
Bill Thayer 41N53 87W38 col cuore a 42N59.5 12E42.4 alt.313m http://www.ukans.edu/history/index/europe/ancient_rome/I/home.html
