There is a 9-time zone in the Time Zone Map of USA. All-time zone boundaries and DST observance are looking after by the Department of Transportation. Time Zone is a Term to describe the local time of a Region or a Country. The local Time within a Time Zone Map is described by its offset (difference) from Coordinated Universal Time (UTC). It is the world’s time standard.
UTC time changes 1 hour forward and backward corresponding to a 1-hour difference in mean solar time for every 15 degrees east or west of the prime meridian (0° longitude) in Greenwich, London, United Kingdom. The offset is expressed as either UTC- or UTC+ and the number of hours and minutes.
Time Zone Map of USA
Nine Standard Time Zones Of USA
- Atlantic Standard Time (AST)
- Eastern Standard Time (EST)
- Central Standard Time (CST)
- Mountain Standard Time (MST)
- Pacific Standard Time (PST)
- Alaskan Standard Time (AKST)
- Hawaii-Aleutian Standard Time (HST)
- Samoa standard time (UTC-11)
- Chamorro Standard Time (UTC+10)