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ClockGlobe

Current UTC time
Coordinated Universal Time

Coordinated Universal Time is the time standard the world sets its clocks by. It is kept by a network of atomic clocks and occasionally adjusted with leap seconds so that it stays close to the rotation of the Earth. Servers, flight plans, weather reports and scientific data are usually written in UTC because it means the same thing everywhere.

UTC and GMT

For an ordinary clock, UTC and Greenwich Mean Time show the same time. The difference is what they are: GMT is a time zone used by the UK in winter and by several countries all year, while UTC is the scientific standard behind every time zone. In technical contexts, “UTC” is the correct term.

Don’t confuse UTC with UK time: London switches to British Summer Time (UTC+1) from late March to late October.

Reading UTC offsets

An offset such as UTC+4 means local clocks are four hours ahead of UTC (Dubai); UTC−5 means five hours behind (New York in winter). Some offsets include minutes, such as UTC+5:30 in India and UTC+5:45 in Nepal.

In timestamps you will often see the ISO 8601 form, for example 2026-11-10T14:00:00Z — the trailing Z means the time is in UTC.

Daylight saving time

UTC has no daylight saving time. When countries change their clocks, their offset from UTC changes — UTC itself stays the same all year.

Zulu time and military time zones

In aviation, shipping and the military, UTC is called Zulu time: “Z” is the letter for the zero offset, so a weather report issued at 1400Z was issued at 14:00 UTC. Every whole-hour offset has its own letter; J (Juliett) means the observer’s local time.

Military time zone letters and their UTC offsets
LetterNameOffset
ZZuluUTC+0
AAlphaUTC+1
BBravoUTC+2
CCharlieUTC+3
DDeltaUTC+4
EEchoUTC+5
FFoxtrotUTC+6
GGolfUTC+7
HHotelUTC+8
IIndiaUTC+9
KKiloUTC+10
LLimaUTC+11
MMikeUTC+12
NNovemberUTC−1
OOscarUTC−2
PPapaUTC−3
QQuebecUTC−4
RRomeoUTC−5
SSierraUTC−6
TTangoUTC−7
UUniformUTC−8
VVictorUTC−9
WWhiskeyUTC−10
XX-rayUTC−11
YYankeeUTC−12
JJuliettObserver’s local time

Example conversions

Calculated from the official time zone rules for two dates, so you can see how daylight saving time affects the result.

Winter example — 15 January 2027

UTCNew YorkLondonIndiaTokyo
09:00 AM04:00 AM09:00 AM02:30 PM06:00 PM
12:00 PM07:00 AM12:00 PM05:30 PM09:00 PM
05:00 PM12:00 PM05:00 PM10:30 PM02:00 AMnext day

Summer example — 15 July 2027

UTCNew YorkLondonIndiaTokyo
09:00 AM05:00 AM10:00 AM02:30 PM06:00 PM
12:00 PM08:00 AM01:00 PM05:30 PM09:00 PM
05:00 PM01:00 PM06:00 PM10:30 PM02:00 AMnext day

Frequently asked questions

What time is it in UTC right now?

The clock at the top shows the current UTC time to the second, calculated from your device clock and the IANA time zone rules.

Is UTC the same as GMT?

On a clock, yes: both are UTC+0. GMT is a time zone, while UTC is the international time standard. The UK only uses GMT in winter; in summer it switches to BST (UTC+1).

Does UTC change for daylight saving time?

No. UTC is the same all year. Places that observe daylight saving time change their offset from UTC instead.

What is Zulu time?

Zulu time is UTC. Military and aviation users write it with the letter Z, as in 1400Z, because Z stands for the zero-offset zone in the military time zone alphabet.

How do I convert UTC to my local time?

Add your local offset to UTC. For example, at 14:00 UTC it is 15:00 in Berlin in winter (UTC+1). The converter below does this for any date, including daylight saving changes.