US Time Zone Map

The contiguous US spans 4 time zones. Alaska and Hawaii use their own.

6 Time Zones at a Glance

Zone	Abbrev.	UTC Offset	DST	Major Cities
Eastern	ET (EST/EDT)	UTC−5 / UTC−4	Yes	New York, Washington D.C., Miami
Central	CT (CST/CDT)	UTC−6 / UTC−5	Yes	Chicago, Houston, Dallas
Mountain	MT (MST/MDT)	UTC−7 / UTC−6	Yes*	Denver, Phoenix, Salt Lake City
Pacific	PT (PST/PDT)	UTC−8 / UTC−7	Yes	LA, San Francisco, Seattle
Alaska	AKT (AKST/AKDT)	UTC−9 / UTC−8	Yes	Anchorage, Fairbanks
Hawaii-Aleutian	HAT (HAST)	UTC−10	No	Honolulu

* Arizona is the only contiguous state that does not observe DST (except the Navajo Nation)

Reading the Abbreviations

• S = Standard, D = Daylight (Saving)
• EST = Eastern Standard Time, EDT = Eastern Daylight Time
• Clocks spring forward 1 hour during DST (March–November)

States Split Across Time Zones

Some states have time zone boundaries running through them:

• Indiana — Mostly Eastern; some western counties are Central
• Kentucky — Eastern half is Eastern; western half is Central
• Tennessee — Knoxville area is Eastern; Nashville and Memphis are Central
• Nebraska — Mostly Central; far west is Mountain
• North & South Dakota — Eastern halves are Central; western halves are Mountain
• Kansas — Mostly Central; a few western counties are Mountain
• Texas — Mostly Central; far west (El Paso) is Mountain
• Oregon — Mostly Pacific; a few eastern counties are Mountain
• Idaho — Southern part is Mountain; northern panhandle is Pacific

The Eastern Time Zone covers the most Americans — about 47% of the US population lives in ET.