USA Time Zones - Complete Guide to United States Time Zones
Comprehensive guide to all 6 US time zones with interactive map, state coverage, DST schedules, and live time displays. Everything you need to know about time zones in the United States of America.
🗺️ United States Time Zones Map & Coverage
📍 USA Time Zones Interactive Map
UTC-5 (EST) / UTC-4 (EDT)
18 States + DC
UTC-6 (CST) / UTC-5 (CDT)
15 States
UTC-7 (MST) / UTC-6 (MDT)
8 States
UTC-8 (PST) / UTC-7 (PDT)
4 States
UTC-9 (AKST) / UTC-8 (AKDT)
Alaska
UTC-10 (HST)
Hawaii (No DST)
📊 Total US Time Zones
Continental US (4) + Alaska + Hawaii
🏛️ States Covered
All states + DC + territories
⏰ DST Observing
All except Arizona & Hawaii
🌍 UTC Range
From UTC-10 to UTC-4
🕐 Complete US Time Zones Breakdown
Eastern Time Zone (EST/EDT)
UTC Offset: UTC-5 (EST) / UTC-4 (EDT)
DST Period: March - November
Population: ~50% of US population
Major Cities: New York City, Miami, Atlanta, Boston, Philadelphia
Central Time Zone (CST/CDT)
UTC Offset: UTC-6 (CST) / UTC-5 (CDT)
DST Period: March - November
Population: ~30% of US population
Major Cities: Chicago, Houston, Dallas, San Antonio, Austin
States in Central Time:
Mountain Time Zone (MST/MDT)
UTC Offset: UTC-7 (MST) / UTC-6 (MDT)
DST Period: March - November (except most of Arizona)
Population: ~7% of US population
Major Cities: Phoenix, Denver, Albuquerque, Salt Lake City
Pacific Time Zone (PST/PDT)
UTC Offset: UTC-8 (PST) / UTC-7 (PDT)
DST Period: March - November
Population: ~15% of US population
Major Cities: Los Angeles, San Francisco, Seattle, San Diego
States in Pacific Time:
Special US Time Zones
Alaska Time Zone (AKST/AKDT)
UTC Offset: UTC-9 (AKST) / UTC-8 (AKDT)
Coverage: Alaska
Major City: Anchorage
📅 Daylight Saving Time in USA
🌅 DST Starts (Spring Forward)
2025: March 9th at 2:00 AM
Clocks move forward 1 hour
🍂 DST Ends (Fall Back)
2025: November 2nd at 2:00 AM
Clocks move back 1 hour
States That Don't Observe DST:
- Arizona: Most of the state (except Navajo Nation)
- Hawaii: Entire state
- US Territories: Puerto Rico, US Virgin Islands, Guam
🏢 Business Hours Across US Time Zones
Eastern Time Business Hours
- Standard Business: 9:00 AM - 5:00 PM ET
- Banking: 9:00 AM - 6:00 PM ET
- Stock Market: 9:30 AM - 4:00 PM ET
- Government: 8:00 AM - 5:00 PM ET
Central Time Business Hours
- Standard Business: 9:00 AM - 5:00 PM CT
- Banking: 9:00 AM - 6:00 PM CT
- Energy Trading: 8:00 AM - 5:00 PM CT
- Agriculture: 7:00 AM - 6:00 PM CT
Mountain Time Business Hours
- Standard Business: 9:00 AM - 5:00 PM MT
- Mining/Energy: 7:00 AM - 5:00 PM MT
- Tourism: 8:00 AM - 8:00 PM MT
- Government: 8:00 AM - 5:00 PM MT
Pacific Time Business Hours
- Standard Business: 9:00 AM - 5:00 PM PT
- Tech Companies: 9:00 AM - 6:00 PM PT
- Entertainment: 10:00 AM - 7:00 PM PT
- International Trade: 6:00 AM - 6:00 PM PT
❓ USA Time Zones FAQ
How many time zones are there in the United States?
The United States has 6 main time zones: Eastern, Central, Mountain, Pacific, Alaska, and Hawaii time zones. The continental US has 4 time zones (Eastern, Central, Mountain, Pacific), plus Alaska and Hawaii have their own unique time zones.
Which states are in which US time zones?
Eastern Time: 18 states including New York, Florida, Georgia. Central Time: 15 states including Texas, Illinois, Wisconsin. Mountain Time: 8 states including Colorado, Utah, Arizona. Pacific Time: 4 states including California, Washington, Oregon, Nevada. Alaska has its own time zone, as does Hawaii.
Do all US states observe Daylight Saving Time?
No, Arizona (except Navajo Nation) and Hawaii do not observe Daylight Saving Time. All other states change their clocks twice yearly: spring forward in March and fall back in November.
What is the time difference between US time zones?
Each time zone is 1 hour apart. Eastern is 1 hour ahead of Central, 2 ahead of Mountain, 3 ahead of Pacific. Alaska is 1 hour behind Pacific, and Hawaii is 2 hours behind Pacific (or 5-6 hours behind Eastern depending on DST).
When do US time zones change for Daylight Saving Time?
DST begins on the second Sunday in March at 2:00 AM (spring forward) and ends on the first Sunday in November at 2:00 AM (fall back). In 2025: March 9th and November 2nd.