Navigate US Time Zones
With Confidence
Interactive maps, live clocks, and instant conversions for seamless time coordination across America's six time zones.
Current Time by Zone
Visual Time Zone Boundaries
Quick Time Converter
Convert between US time zones instantly with our simple tool
Business Hours Calculator
Find the best meeting times across different US time zones
Overlapping Business Hours (9 AM - 5 PM)
Time Zone Overview
Eastern Time Zone
Home to major cities like NYC, Boston, and DC, Eastern Time serves nearly half the US population. This zone spans from Maine to Florida along the Atlantic coast.
Central Time Zone
Stretching from the heartland to the Gulf Coast, Central Time encompasses Chicago, Houston, Dallas, and Minneapolis. This diverse zone bridges America's agricultural and industrial centers.
Mountain Time Zone
From the Rocky Mountains to the desert Southwest, Mountain Time includes Denver, Phoenix, and Salt Lake City. Arizona uniquely maintains standard time year-round.
Pacific Time Zone
The West Coast's Pacific Time covers California, Oregon, Washington, and Nevada. From tech hubs to entertainment capitals, this zone drives innovation and culture.
Alaska Time Zone
Alaska's vast expanse primarily follows Alaska Time, covering Anchorage, Fairbanks, and Juneau. The remote Aleutian Islands align with Hawaii-Aleutian time.
Hawaii-Aleutian Time
The Hawaiian Islands maintain consistent Hawaii-Aleutian Standard Time throughout the year, sharing this zone with Alaska's westernmost islands. No DST adjustments needed.
Common Time Zone Questions
In-Depth Guides
When DST starts and ends, which states skip it, and how the Sunshine Protection Act would change current rules. A complete look at how clocks shift across the US.
All 50 states and the District of Columbia, mapped to their primary time zone — plus the thirteen states that are split, with details on where the lines run.
What every US time zone abbreviation actually means, when to use ET vs. EST vs. EDT, and how to avoid the most common mix-ups in email and meeting invites.
Puerto Rico, the US Virgin Islands, Guam, the Northern Mariana Islands, American Samoa, and the smaller possessions — how their time zones relate to the mainland.
How the railroads, the Standard Time Act of 1918, and the Uniform Time Act of 1966 turned a chaotic patchwork of local times into the six-zone system used today.