Does the United States observe daylight saving time?

Most US states observe DST — clocks spring forward at 2 AM on the second Sunday in March and fall back at 2 AM on the first Sunday in November. Arizona (except the Navajo Nation) and Hawaii do not observe DST and stay on a fixed UTC offset year-round.

What is the time difference between New York and Los Angeles?

New York (ET) is always 3 hours ahead of Los Angeles (PT) year-round. Both cities observe DST on the same schedule. New York to Chicago = 1 hour, New York to Denver = 2 hours, New York to Honolulu = 5 hours (fixed).

อัพเดท มี.ค. 2026

Current Time in United States

Q: What time is it in United States right now?

United States spans 4 timezones: CST, EST, MST, PST. Use the live clocks on this page for the exact local time in each major city.

Q: When is the best time to call someone in United States?

Aim for 9:00 AM to 5:00 PM local time in the specific city you are calling. Because United States spans 4 timezones, the right call window depends on the city, not just the country. Use the Best Time to Call calculator for an exact overlap window.

Live clocks for every United States city — UTC offsets, DST status, and inter-city time gaps.

, United States

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PST สังเกตเวลา DST

รายละเอียดทั้งหมด

--:--:-- EST --:--:-- PST --:--:-- CST --:--:-- MST

โครงสร้างเขตเวลาของประเทศนี้

The US mainland — five continental timezones + DST

The US mainland covers four timezones (Eastern, Central, Mountain, Pacific), with Alaska adding a fifth and Hawaii a sixth. DST is nearly universal — observed from mid-March to early November — except in Arizona (no DST) and Hawaii (no DST). Multi-office US corporations default to Eastern Time for shared calendars regardless of headquarters, so "10 AM ET / 9 AM CT / 8 AM MT / 7 AM PT" is the standard four-way notation on internal meeting invites.

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Timezones across North America

North America runs five continental-US timezones (Eastern, Central, Mountain, Pacific, Alaskan) plus Newfoundland (a 30-minute offset from Atlantic Time — one of the few 30-minute timezones outside Asia). DST is nearly universal (except Arizona, Hawaii, most of Saskatchewan) and runs March → November. Business scheduling defaults to Eastern for multi-office US corporations regardless of headquarters.

United States Cities by Timezone

4 timezones · 14 cities · live times

EST 5 PST 4 CST 3 MST 2

EST

5 cities

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PST

4 cities

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CST

3 cities

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MST

2 cities

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ความแตกต่างของเวลาอาจเปลี่ยนแปลงตามฤดูกาลเมื่อเมืองต่างๆ สังเกตตารางการปรับเวลาตามฤดูกาลที่แตกต่างกัน

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Timezones, DST rules, and scheduling in United States

What time is it in United States right now?

United States spans 4 timezones — CST, EST, MST, PST — so there is no single answer. The live clocks above show the exact time in , , , , , .

How many timezones does United States have?

United States uses 4 timezones: CST, EST, MST, PST. Not all regions change clocks on the same schedule — check the DST badge next to each city clock for the current status.

Does United States observe daylight saving time?

Most US states spring forward at 2:00 AM on the second Sunday in March and fall back at 2:00 AM on the first Sunday in November. Two exceptions: Arizona stays on Mountain Standard Time (UTC−7) year-round with no DST. Hawaii stays on HST (UTC−10) year-round. The Navajo Nation within Arizona does follow DST.

When is the best time to call someone in United States?

Aim for 9:00 AM – 5:00 PM local time in the specific city. Because United States spans 4 timezones, the overlap window from your location differs between cities. Open any city page above for its full scheduling guide.

นาฬิกาสดในหน้านี้แม่นยำแค่ไหน?

นาฬิกาทั้งหมดอัปเดตทุกวินาทีโดยใช้กลไกเขตเวลาของเบราว์เซอร์ของคุณ โดยมีกฎ DST ปัจจุบันปรับใช้โดยอัตโนมัติ เวลาที่แสดงตรงกับเวลาท้องถิ่นอย่างเป็นทางการของแต่ละเมือง ไม่จำเป็นต้องรีเฟรชด้วยตนเอง