The 4 time zones of the contiguous USA and the 2 timezones (Alaska, Hawaii) beyond the contiguous USA. Other US time zones follow the same format and moving westward, each time zone adds an additional 1-hour offset. Eastern Daylight Time (EDT), which is used during spring/summer and is four hours behind UTC States that span multiple time zones, where all polls close at the same local time, are listed twice, along with the associated time zone.Eastern Standard Time (EST), which is used during autumn/winter and is five hours behind UTC.The time zone on the east coast is called Eastern Time (ET), divided into: DNR issues multi-day air quality alert for Wisconsin. two time zones beyond the contiguous USA 1 day ago &0183 &32 DeForest man accused of threatening officials faces federal jail time.The United States observes 9 time zones as below: The World Clock - Time Zone Converter - USA Wisconsin Milwaukee vs USA Minnesota St. Dangerous High Temperatures Stretch Across the South.

Like all time zones worldwide, the time zones for the USA are based on UTC (Coordinated Universal Time, formerly GMT, Greenwich Mean Time - originally based on London, UK).

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