Time zone
UTC
Coordinated Universal Time
Coordinated Universal Time (UTC) is the world’s baseline clock and sits at the tidy intersection of astronomy and human scheduling. It’s the steam-free, DST-free middle ground that tech teams and remote collaborators treat as their planning default.
Sunday, May 31, 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) is the world’s baseline clock and sits at the tidy intersection of astronomy and human scheduling. It’s the steam-free, DST-free middle ground that tech teams and remote collaborators treat as their planning default.
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.
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].
- Is UTC the same as GMT?
- They overlap in everyday use — both label the same “zero-offset” time — but GMT is technically a civil time zone, whereas UTC is a precise atomic time standard used behind the scenes for computing and navigation.
- Why do server logs and engineers love UTC so much?
- Because it’s unchanging: no daylight saving jumps, no seasonal rule tweaks, and no country-specific quirks. That makes sorting events and comparing timestamps across regions far less error-prone.
- Does ever-changing UTC observe daylight saving?
- No, UTC never shifts for daylight saving in any direction, which keeps the reference frame stable while other offset zones dance around it.
- Is any country set on UTC year-round?
- Yes, a handful — including Iceland and some Atlantic territories near the prime meridian — use a year-round offset identical to UTC, though they often call it by a local name for everyday use.
- How do timestamps on the Internet rely on UTC?
- From TLS certificates to upload metadata, many Internet standards stamp UTC as the canonical reference so that machines can compare times without worrying about time zones.
- Can phone or social apps, including XLSX timestamps, quietly default to UTC?
- Some spreadsheets store date-times as plain “serial” numbers without a zone label, which means you must know whether the author meant UTC or a local zone to avoid costly misalignment.
- What is the “leap seconds” talk all about for UTC?
- Imagine a ghost edit to the clock: leap seconds are rare one-second adjustments added or planned to sync the ultra-precise atomic UTC with Earth’s slowly wobbling rotation.
- For time-sensitive meetings, which offset table is safest?
- If a group spans Europe, APAC, and the Americas, scheduling in UTC equivalents is often the safest fallback because it avoids double conversions if someone misreads a local label.
- Would a reminder for “midnight UTC” behave strangely for users elsewhere?
- Yes, midnight UTC is dawn day-end for some regions and start-of-day for others, so ZONE-related reminders or catch-up tools should always state the zone alongside the time.
Free · Developer API
Time, as JSON.
Every IANA time zone with live offsets, DST status, and the countries and cities that use them — clean, dependable JSON. Sign up free and get an API key in seconds.
countries, cities, convert, DST transitions coming next.
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