US Time Zones Explained: Complete Guide to All 6 Zones in 2026

47% of Americans live in Eastern Time — the rest are spread across 5 other zones, and Arizona breaks the rules entirely by ignoring DST. Here's the practical breakdown of every US time zone, what cities are in each, and the edge cases that trip people up.

The 6 US Time Zones at a Glance

The continental United States spans four main time zones, with Alaska and Hawaii adding two more. The total spread from Eastern to Hawaii is 6 hours — when it's 5 PM in New York, it's 11 AM in Honolulu.

Eastern Time Zone (ET) — Where Nearly Half of America Lives

The Eastern Time Zone contains the largest share of the US population and dominates business, finance, and media. Wall Street, the federal government, and most major TV networks operate on Eastern Time, which is why "prime time" in the US is defined by ET.

Major Cities

• New York City, NY
• Washington, D.C.
• Miami, FL
• Atlanta, GA
• Boston, MA
• Philadelphia, PA
• Detroit, MI

Central Time Zone (CT) — The Heartland

The Central Time Zone covers 29% of Americans and includes the agricultural and energy centers of the country. It's 1 hour behind Eastern — a gap small enough that cross-timezone scheduling within the US rarely causes issues for this corridor.

Major Cities

• Chicago, IL
• Houston, TX
• Dallas, TX
• San Antonio, TX
• Memphis, TN
• Minneapolis, MN
• New Orleans, LA

Mountain Time Zone (MT) — And the Arizona Exception

The Mountain Time Zone covers the Rocky Mountain states. It's the least populated of the four continental zones.

Arizona's Special Case

Arizona does not observe Daylight Saving Time (except the Navajo Nation, which does). This creates a confusing situation:

• In winter, Arizona is on MST (UTC-7) — same as the rest of the Mountain zone
• In summer, Arizona stays on MST (UTC-7) while the rest of the zone moves to MDT (UTC-6). So Arizona effectively aligns with Pacific Daylight Time during summer.

If you're scheduling a call with someone in Phoenix, always confirm whether they're currently aligned with Mountain or Pacific. The converter handles this automatically.

Major Cities

• Denver, CO
• Phoenix, AZ (no DST)
• Albuquerque, NM
• Salt Lake City, UT
• Boise, ID

Pacific Time Zone (PT) — Tech and Entertainment

The Pacific Time Zone covers the West Coast and is home to Silicon Valley, Hollywood, and the tech industry. It's 3 hours behind Eastern — the widest gap in continental US business scheduling.

Major Cities

• Los Angeles, CA
• San Francisco, CA
• Seattle, WA
• Portland, OR
• Las Vegas, NV
• San Diego, CA

The SF-to-New York corridor has 5 hours of business-hours overlap (9 AM PT to 5 PM ET covers 12 PM - 5 PM ET / 9 AM - 2 PM PT). Most coast-to-coast companies schedule cross-team meetings between 12 PM and 2 PM ET / 9 AM and 11 AM PT.

Alaska and Hawaii

Alaska Time (AKT) covers most of Alaska at UTC-9 (UTC-8 during DST). Anchorage is 4 hours behind New York.

Hawaii-Aleutian Time (HAT) at UTC-10 does not observe DST — Hawaii is always UTC-10 year-round. This means the gap between Hawaii and the mainland changes with DST: Honolulu is 5 hours behind Los Angeles in winter but 6 hours behind in summer.

Daylight Saving Time in the US

2026 DST Dates

• Spring Forward: March 8, 2026 at 2:00 AM
• Fall Back: November 1, 2026 at 2:00 AM

Places That Don't Observe DST

• Arizona (except the Navajo Nation)
• Hawaii
• US Territories: Puerto Rico, US Virgin Islands, Guam, American Samoa, Northern Mariana Islands

The key thing to remember: Nearly half the country is on Eastern Time, the ET-to-PT gap is 3 hours, Arizona ignores DST (and aligns with Pacific in summer), and Hawaii is always 2-3 hours behind the West Coast depending on the season. When in doubt, check the converter.