✨ The new timezoneconverter.co is live: a faster converter, a meeting planner that adds calls to your calendar, and new guides.💜 Thank you for helping us reach almost 10,000 users every month.
timezoneconverter.co
☰
Converter Time now US time now UK time now Singapore time now World cities Countries All converters Guides About Plan a meeting

UTC to GMT converter

Convert UTC to GMT. They match in winter; in summer London is one hour ahead of UTC because the UK is on British Summer Time.

From
UTC
To
London
Live
UTCUTC
9:00 AM
 
Working hours
LondonGMT
9:00 AM
 
Working hours

London and UTC show the same time (UTC vs GMT).

Need a time that works for three or more people or cities? Plan a meeting →
Gap
Same time
Same time in both places today
Working hours overlap
9:00 AM–5:00 PM UTC
9:00 AM–5:00 PM in London; both sides in a 9-to-5 day
Next gap change
Mar 28, 2027
The gap becomes 1 hour (London clocks go forward)
9:00 AM UTC
9:00 AM GMT
London and UTC show the same time, as of Nov 6, 2026

Reading UTC in London

Going from UTC to GMT is a one-step conversion with a seasonal footnote. The two share the same zero offset, so 15:00 UTC is 15:00 GMT. What most people actually want, however, is the time on a London wall clock, and that is where the one-hour difference appears.

From the last Sunday of October to the last Sunday of March, the UK is on GMT and London matches UTC. For the other seven months the UK is on BST and the London clock is one hour ahead. A UTC timestamp read by a Londoner in July therefore needs one hour added.

Many systems tell you the time in UTC, while people in Britain want to know what that means on their own clocks.

Server logs and monitoring

Dashboards, error logs and alerts typically show UTC, even for UK companies.

  • An alert at 13:20 UTC was 13:20 in London in January
  • The same alert in July was at 14:20 London time
  • A log entry at 23:30 UTC in summer is 00:30 the next day in London

A midnight-boundary log can belong to different dates in London and in UTC.

Releases and live events

International events often publish a UTC time that UK audiences have to convert.

  • 19:00 UTC is 7:00 PM GMT in winter
  • In summer it is 8:00 PM BST
  • A 00:00 UTC game release is 1:00 AM BST on the same date

UK fans in summer often stay up an hour later than the UTC clock suggests.

Weather, tides and astronomy

The Met Office, the Admiralty and observatories publish data in UTC.

  • A forecast issued at 06:00 UTC is available at 7:00 AM BST
  • Tide times in UTC need +1 hour in summer
  • Sunrise times may be listed in UTC or in local time, so check the label

The header usually says UTC or GMT; the numbers are the same, but local times are different in summer.

Deadlines given in UTC

A deadline of 23:59 UTC falls at 23:59 GMT in winter and at 00:59 BST the next day in summer. UK applicants need to take care that they do not submit in the wrong half of the night.

Cloud billing cycles and API quotas reset at 00:00 UTC. For a company in the UK this is midnight in winter and 1:00 AM in summer, so a nightly reset appears to run an hour late in the summer months.

Why the answer depends on the date

UTC is constant. London moves from GMT to BST on the last Sunday of March and back on the last Sunday of October. Between those dates, UTC to London is plus one hour.

Dates for 2026–27. Calculated from the IANA time zone database on Nov 6, 2026: today London and UTC show the same time. In northern winter the gap is zero, in northern summer 1 hour. The clock changes ahead are:
  • Mar 28, 2027: London moves to BST (UTC+1); the gap becomes 1 hour
  • Oct 31, 2027: London moves to GMT (UTC+0); the gap becomes zero

The best habit is to write both when you share a time with a mixed audience, for example "19:00 UTC (8:00 PM London)". It takes a few extra words and prevents most mistakes in March and October.

UTC to London, every hour

Times are for Nov 6, 2026, when London and UTC show the same time. The gap changes on the dates listed above. Green rows are the hours when both places are inside a 9-to-5 day.

UTC (UTC)LondonGMT, 0 hrs
12:00 AM (midnight)12:00 AM
1:00 AM1:00 AM
2:00 AM2:00 AM
3:00 AM3:00 AM
4:00 AM4:00 AM
5:00 AM5:00 AM
6:00 AM6:00 AM
7:00 AM7:00 AM
8:00 AM8:00 AM
9:00 AM9:00 AM
10:00 AM10:00 AM
11:00 AM11:00 AM
12:00 PM (noon)12:00 PM
1:00 PM1:00 PM
2:00 PM2:00 PM
3:00 PM3:00 PM
4:00 PM4:00 PM
5:00 PM5:00 PM
6:00 PM6:00 PM
7:00 PM7:00 PM
8:00 PM8:00 PM
9:00 PM9:00 PM
10:00 PM10:00 PM
11:00 PM11:00 PM

“next day” and “previous day” mean London is on a different calendar date from UTC.

Quick answers

Is UTC the same as GMT?

Yes for the numbers on a clock. GMT is a time zone; UTC is the time standard. The offset of both is zero.

What is 10:00 UTC in London?

10:00 in winter (GMT) and 11:00 in summer (BST).

Why is London one hour ahead of UTC in July?

Because the UK observes British Summer Time, GMT plus one hour, from late March to late October.

What is midnight UTC in London?

00:00 in winter and 1:00 AM in summer.

Do other countries use GMT all year?

Yes. Iceland, Ghana, Senegal and several West African countries keep UTC+0 all year, with no seasonal change.