Live Time Standard
Current UTC Time
The official, second-exact Coordinated Universal Time. UTC never observes daylight saving time and never changes offset.
Coordinated Universal Time (UTC)
The standard
UTC — Coordinated Universal Time — is the zero-point reference for every civil clock on Earth. Unlike local time zones, UTC never observes daylight saving time, never leaps for seasonal hours, and remains constant worldwide throughout the year.
Major City Offsets from UTC
| City / Region | Standard Offset (Winter) | Daylight Offset (Summer) |
|---|---|---|
| London (United Kingdom) | UTC+0 (GMT) | UTC+1 (BST) |
| Paris / Berlin / Rome / Madrid | UTC+1 (CET) | UTC+2 (CEST) |
| New York / Toronto / Miami | UTC−5 (EST) | UTC−4 (EDT) |
| San Francisco / Los Angeles | UTC−8 (PST) | UTC−7 (PDT) |
| Dubai (United Arab Emirates) | UTC+4 (No DST) | UTC+4 (No DST) |
| Tokyo (Japan) | UTC+9 (No DST) | UTC+9 (No DST) |
| Sydney (Australia) | UTC+10 (AEST) | UTC+11 (AEDT) |
Why UTC Never Changes
UTC is derived from International Atomic Time (TAI), calculated from an ensemble of over 400 high-precision atomic clocks in national metrology institutes globally. Because political decisions regarding Daylight Saving Time occur locally, civil authorities shift their local offset from UTC rather than moving the UTC baseline itself.
Frequently Asked Questions
Does UTC observe Daylight Saving Time?
No. Coordinated Universal Time (UTC) never shifts for Daylight Saving Time. It remains completely constant year-round, serving as the global baseline from which all local time zones calculate offsets.
What is the difference between UTC and GMT?
UTC is a high-precision atomic time standard, while GMT is a historical astronomical time zone. In everyday use they share the same zero-hour offset, but UTC is the official international scientific and computing standard.
Why is UTC time used in aviation, servers, and maritime operations?
UTC eliminates ambiguity across borders and seasonal clock changes. Flights, server logs, satellite telemetry, and financial ledgers record events in UTC to maintain an unbroken, globally synchronised timeline.
How do I calculate my local time from UTC?
Take the current UTC time and add or subtract your local UTC offset (for example, New York is UTC-5 in winter and UTC-4 in summer; Paris is UTC+1 in winter and UTC+2 in summer).
Keep an exact UTC clock on your Lock Screen
The Timezone app provides native iPhone widgets, live day/night solar terminators, and offline world clock tools.