Time zone
UTC
Coordinated Universal Time
Coordinated Universal Time (UTC) serves as the world's primary time standard, forming the backbone of global timekeeping. It offers a stable, unchanging reference point that never observes daylight saving, making it the most reliable timezone for international coordination.
Thursday, October 15, 2026
Current offset
UTC+00:00
Standard · UTC
Daylight saving
Not observed
Year-round standard time
IANA zones
1
None observe daylight saving
DST offset
—
No summer variant
About UTC
A fixed, year-round offset.
Coordinated Universal Time (UTC) serves as the world's primary time standard, forming the backbone of global timekeeping. It offers a stable, unchanging reference point that never observes daylight saving, making it the most reliable timezone for international coordination.
IANA zones · the technical identifiers
The zone that resolve to UTC.
For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.
Same offset · UTC+00:00
Other zones at UTC+00:00 right now.
These named zones share UTC's offset today. When daylight saving rules differ, they drift apart for part of the year.
Convert
UTC to the world's clocks.
Frequently asked questions
Common questions about UTC, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- Why doesn't UTC observe daylight saving time?
- UTC is a fixed time standard based on International Atomic Time, deliberately kept consistent to serve as an anchor for all other timezones worldwide.
- How is UTC used globally?
- UTC serves as the reference point for all global timezones, used extensively in aviation, military operations, scientific research, and international trade to ensure precise synchronization across borders.
- What makes UTC unique compared to other timezones?
- UTC stands alone as a fixed standard without member countries or territories—it is a pure time coordination tool rather than a geographic timezone tied to any single nation.
- How does UTC relate to Greenwich Mean Time (GMT)?
- UTC is the modern successor to Greenwich Mean Time, maintaining the same offset (UTC+00:00) but now defined by atomic clocks rather than astronomical observations.
Source: IANA tzdb2026e · Reviewed
Free · Developer API
This time zone, as JSON.
Its defining offset, DST status and member counts, from one endpoint.
Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.
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