Current UTC Time
UTC (Coordinated Universal Time) is the primary time standard used worldwide. It does not change with the seasons and serves as the baseline for all civil time zones.
All time zones are defined as offsets from UTC. For example, New York is UTC-5 in winter and UTC-4 in summer, while Tokyo is UTC+9 year-round. Use the current time lookup to see any city's local time relative to UTC.
What Is UTC?
UTC is the time standard that the world's clocks and timekeeping systems are regulated by. It is maintained by a network of atomic clocks in laboratories around the globe and is coordinated by the International Bureau of Weights and Measures (BIPM) in Paris.
Unlike local time zones, UTC never shifts for daylight saving time. This makes it the preferred reference for aviation, computing, scientific research, and international communication.
Key Facts About UTC
- UTC is not a time zone — it is a time standard. However, several countries (like Iceland and Ghana) use UTC+0 as their civil time.
- The abbreviation "UTC" is a compromise between the English "CUT" and the French "TUC."
- UTC is based on International Atomic Time (TAI), with leap seconds added periodically to stay in sync with Earth's rotation.
- UTC replaced Greenwich Mean Time (GMT) as the world's standard in 1960. Learn more about how UTC and GMT differ.
UTC Offset Map
The map below shows how each region deviates from UTC. The offset is shown in hours (e.g., UTC+8 for Singapore, UTC-5 for New York in winter).
Who Uses UTC?
- Aviation: All flight schedules and air traffic control communications use UTC (referred to as "Zulu time").
- Computing: Servers, databases, and network protocols store timestamps in UTC to avoid time zone ambiguity.
- Science: Astronomical observations, satellite tracking, and meteorological records are logged in UTC.
- Military: Coordinated operations across regions rely on UTC as a common reference.
- Finance: International markets and settlement systems use UTC to synchronize transactions.
UTC Offset Quick Reference
Related Pages
- GMT Time — Greenwich Mean Time, the predecessor to UTC
- UTC vs GMT — a detailed comparison of both standards
- All Time Zones — complete list with UTC offsets
- Time Difference Calculator — compare times between cities
- Current Time Lookup — find the local time in any city
- International Date Line — where the calendar day changes
For alternative time and clock tools, visit WorldWideClock.com.