Eastern,Central,Mountain,Pacific
It depends on the cities you are talking about. Mexico spans three timezones while the contiguous United States spans four.
Before 1884 there were over 2,000 timezones in the US.
timezones of course are you dumb
rail roads
south
There are 24 major time regions. However a number of countries have local time zones that differ from the major ones by 15 minutes or a half hour.
My dick
the timezones
The US is not bordered by the Indian Ocean or the Southern Ocean.
Maze,wheat,rice,brea are major types of grains in the US
The four major ones are the legislature, the executive branch, the courts and the bureaucracies.
Rockies, Sierra Nevadas, Appalachian, and Allegheny mountains are the biggest four ranges.