UTC is the time standard everything else is measured against. Unlike a local time zone it never
shifts for daylight saving, so it is the same instant everywhere on Earth at once. Time zones are
defined as offsets from UTC — UTC-5 for the US East Coast in winter, UTC+1 for most of Europe, UTC+9
for Japan — which makes UTC the natural common reference for anything that crosses borders.
The clock above is driven by your device's own clock and updates every second. If you need to turn
this instant into a plain number for a database or an API, the Unix
timestamp converter does exactly that; to compare UTC against specific cities, try the
time zone converter.
Frequently asked questions
What is UTC?
UTC — Coordinated Universal Time — is the primary time standard the world sets its clocks by. It has no daylight saving and never changes with the seasons, which is why it is used in aviation, computing, science and international coordination.
Is UTC the same as GMT?
For everyday purposes yes — UTC and GMT show the same clock time. The difference is technical: UTC is defined by atomic clocks and is the modern standard, while GMT is the older astronomical reference on the Greenwich meridian.
What is my time zone offset from UTC?
Your offset is the difference between your local clock and UTC. For example, New York in winter is UTC-5 and India is UTC+5:30. The clock on this page is UTC itself, so subtract or add your own offset to convert.
Why is UTC used instead of local time?
Because it is unambiguous everywhere. A log entry, a flight time or a satellite command stamped in UTC means the same instant worldwide, with no need to know which country or daylight-saving rule applied.