How accurate is the displayed time?

The times are derived from your device clock via the browser's Intl API. They update every second and reflect the correct UTC offset for each zone, including DST. If your device clock is accurate, so are the displayed times.

How does the tool know whether DST is active?

The browser's Intl.DateTimeFormat API returns the actual wall-clock offset for a given moment. By comparing that offset with the zone's standard (winter) offset, the tool determines whether clocks have "sprung forward."

Does Arizona observe Daylight Saving Time?

Most of Arizona stays on Mountain Standard Time (UTC-7) year-round and does not observe DST. The Navajo Nation inside Arizona does observe DST. This tool shows the Mountain time zone generically; for Arizona-specific accuracy, note that MT displayed here matches Arizona time during daylight saving months.

What does "UTC offset" mean?

The UTC offset is the number of hours a time zone is ahead of or behind Coordinated Universal Time (UTC). For example, Eastern Standard Time is UTC-5, meaning it is 5 hours behind UTC.

Can I copy a time to my clipboard?

Yes. Click any time zone card to copy its current displayed time to your clipboard.

USA Time Zones Overview

Name: USA Time Zones Overview
Availability: InStock
Author: Nham Vu

See the current local time for all major US time zones at a glance, with UTC offsets and DST status, updating live every second.

Universal Time (UTC)

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UTC Date

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Eastern

EST / EDT

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UTC ---

Click to copy time

Central

CST / CDT

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UTC ---

Click to copy time

Mountain

MST / MDT

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UTC ---

Click to copy time

Pacific

PST / PDT

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UTC ---

Click to copy time

Alaska

AKST / AKDT

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UTC ---

Click to copy time

Hawaii

HST

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UTC ---

Click to copy time

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Summary

See the current local time for all major US time zones at a glance, with UTC offsets and DST status, updating live every second.

How it works

The page loads and immediately reads your browser clock.
JavaScript formats the current moment into each US time zone using the Intl.DateTimeFormat API.
DST status is computed by comparing the current UTC offset with the zone's standard (winter) offset.
A setInterval updates every card once per second so the displayed times stay current.
Clicking any card copies the displayed time to your clipboard.

Use cases

Schedule a meeting or call across multiple US regions.
Check whether a city on the other side of the country is still in business hours.
Confirm current DST status before booking a flight or setting an alarm.
Quickly see what time it is in Hawaii or Alaska without mental arithmetic.
Developers debugging timestamp issues across US data centers.
Remote teams coordinating stand-ups across East and West Coast offices.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu