Exact current time in United States across Eastern, Central, Mountain, Pacific, Alaska & Hawaii zones. Real-time synchronized atomic clocks, weather & tools. Exact time now, time zone, time difference, sunrise/sunset time and key facts for United States. Live current time across 11 U.S. time zones, including Alaska, Hawaii, Arizona, and territories. Static map image and DST notes. Check the current time in United States and time zone information, the UTC offset and daylight saving time dates in 2026. UTC is always displayed as a 24-hour clock. NIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life. See the current time across all time zones in United States, with live clocks, local dates, major cities, sunrise and sunset information. 7 million locations, 59 languages, synchronized with atomic clock time. Calculate local times for day length, dusk, dawn, and much more. Exact times for each Moon phase in your city. Calculate local times for moonrise, moonset, altitude, and much more. Local times for solar and lunar eclipses and what they look like. Find and track the Sun, Moon, planets, and stars. There are four time zones used in the contiguous U.S.: Pacific Time Zone, Mountain Time Zone, Central Time Zone, Eastern Time zone. Alaska and Hawaii have their own time zones, there are five more of them comprising different U.S. territories. USA time zones and time zone map with current time in each state.