The four time zones of the contiguous United States are the Eastern, Central, Mountain and Pacific. Hawaii lies in the Hawaiian time zone and Alaska sits in the Alaskan time zone.
The Eastern time zone includes the entire east coast, Ohio, Pennsylvania, Vermont, New Hampshire and parts of Michigan, Indiana, Tennessee, Kentucky and Florida. The Central time zone includes Minnesota, Iowa, Alabama, Mississippi and Arkansas and the majority of Texas, North Dakota, South Dakota, Oklahoma and Kansas. States within the Mountain time zone include Montana, Colorado, Wyoming, Utah, Arizona and New Mexico. The Pacific time zone includes California, Washington, Nevada and the majority of Oregon.