USA has more than one time zone, therefore time varies across the country. To see the exact time in various cities in USA visit the city page by searching the city name in the search box at the top of this page.
To see the time difference between USA and other countries use the USA Time Comparison box at the top of the page.
The time zones in the United States
Eastern Time Zone: This time zone covers cities on the East Coast including New York, Miami and Atlanta. It is five hours behind Coordinated Universal Time during standard time and four hours behind UTC during DST.
Central Time Zone: This time zone covers cities such as Houston, Chicago and Jackson. It is six hours behind UTC during standard time and five hours behind UTC during DST.
Mountain Time Zone: This time zone covers cities such as Denver, Helena and Cheyenne. It is seven hours behind UTC during standard time and six hours behind UTC during DST.
Pacific Time Zone: This time zone covers cities such as LA, Portland and Seattle. It is eight hours behind UTC during standard time and seven hours behind UTC during DST.
Alaska Time Zone: This time zone covers Alaska and is nine hours behind UTC during standard time and eight hours behind UTC during DST.
Hawaii-Aleutian Time Zone: This time zone covers Hawaii and the Aleutian Islands of Alaska. It is ten hours behind UTC during standard time and nine hours behind UTC during DST.
US states using EST
Connecticut, Delaware, Georgia, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Vermont, Virginia and West Virginia.
US states using CST
Alabama, Arkansas, Illinois, Iowa, Louisiana, Minnesota, Mississippi, Missouri and Wisconsin.
US states using MST
Colorado, Montana, New Mexico, Utah, Wyoming and Arizona.
US states using PST
California, Nevada and Washington.
15 US states use more than one time zone
Five US states use both EST and CST: Tennessee, Michigan, Florida, Indiana and Kentucky.
Six US states use both CST and MST: Kansas, Nebraska, North Dakota, Oklahoma, South Dakota and Texas.
US states that use both PST and MST: Idaho, Nevada and Oregon.
Alaska is split between the PST and the Alaska Time Zone.
DST in the United States
Arizona is in the Mountain Time Zone but it does not observe daylight saving time. As a result it is always UTC-7 in Arizona regardless of the time of year. Hawaii also does not observe daylight saving time and is always UTC-10.
DST begins on the second Sunday in March when clocks are set forward one hour at 2:00 AM local time. This change results in longer daylight hours in the evenings and is intended to conserve energy by reducing the need for artificial lighting. DST ends on the first Sunday in November when clocks are set back one hour at 2:00 AM local time. This change results in shorter daylight hours in the evenings.
It's important to note that not all states in the USA observe daylight saving time. Hawaii as mentioned earlier does not observe it and neither does most of Arizona (although the Navajo Nation within Arizona does observe it). Additionally the territories of Puerto Rico, the US Virgin Islands, Guam and American Samoa do not observe daylight saving time.
Time Conversion among US Time Zones
PDT to MDT: Time difference between PDT and MDT is 1 hour. MDT is 1 hour ahead of PDT. 1 pm in PDT = 2 pm in MDT. PDT to CDT: Time difference between PDT and CDT is 2 hours. CDT is 2 hours ahead of PDT. 1 pm in PDT = 3 pm in CDT. PDT to EDT: Time difference between PDT and EDT is 3 hours.
EDT is 3 hours ahead of PDT. 1 pm in PDT = 4 pm in EDT. PDT to HST: Time difference between PDT and HST is 3 hours.
PDT is 3 hours ahead of HST. 1 pm in HST = 4 pm in PDT. PDT to AKDT: Time difference between PDT and AKDT is 1 hour.
PDT is 1 hour ahead of AKDT. 1 pm in AKDT = 2 pm in PDT. MDT to CDT: Time difference between MDT and CDT is 1 hour.
CDT is 1 hour ahead of MDT. 1 pm in MDT = 2 pm in CDT. MDT to EDT: Time difference between MDT and EDT is 2 hours.
EDT is 2 hours ahead of MDT. 1 pm in MDT = 3 pm in EDT. MDT to HST: Time difference between MDT and HST is 4 hours.
MDT is 4 hours ahead of HST. 1 pm in HST = 5 pm in MDT. MDT to AKDT: Time difference between MDT and AKDT is 2 hours.
MDT is 2 hours ahead of AKDT. 1 pm in AKDT = 3 pm in MDT. CDT to EDT: Time difference between CDT and EDT is 1 hour.
EDT is 1 hour ahead of CDT. 1 pm in CDT = 2 pm in EDT. CDT to HST: Time difference between CDT and HST is 5 hours.
CDT is 5 hours ahead of HST. 1 pm in HST = 6 pm in CDT. CDT to AKDT: Time difference between CDT and AKDT is 3 hours.
CDT is 3 hours ahead of AKDT. 1 pm in AKDT = 4 pm in CDT. EDT to HST: Time difference between EDT and HST is 6 hours.
EDT is 7 hours ahead of HST. 1 pm in HST = 7 pm in EDT. EDT to AKDT: Time difference between EDT and AKDT is 4 hours.
EDT is 4 hours ahead of AKDT. 1 pm in AKDT = 5 pm in EDT. HST to AKDT: Time difference between HST and AKDT is 2 hours.
AKDT is 2 hours ahead of HST. 1 pm in HST = 3 pm in AKDT.