Time zone converter

GMT to UTC

On Oct 23, 2026, Coordinated Universal Time is 1 hour behind UK time: 9:00 AM BST is 8:00 AM UTC. The gap changes during the year because of daylight saving time; the dates are below.

UK time
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Current time in UK time
Coordinated Universal Time
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Current time in Coordinated Universal Time
Pick a date and time to convert.

UTC vs GMT over the next 12 months

PeriodUTC isExample
Oct 23, 2026 to Oct 25, 20261 hour behind9:00 AM BST = 8:00 AM UTC
Oct 25, 2026 to Mar 28, 2027same time9:00 AM GMT = 9:00 AM UTC
Mar 28, 2027 onwards1 hour behind9:00 AM BST = 8:00 AM UTC

GMT to UTC conversion table

Every hour of a weekday around Oct 23, 2026, in both zones.

UK timeCoordinated Universal Time
12:00 AM12:00 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 PM12:00 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

Best time for a meeting

Normal 9-to-5 working hours overlap for 8 hours on a weekday: 9:00 AM–5:00 PM GMT, which is 9:00 AM–5:00 PM UTC.

Comparing more than two places? The meeting planner lines up working hours for up to six cities.

Daylight saving time

UK time (GMT/BST)

  • Oct 25, 2026: clocks go back 1 hour at 2:00 AM (UTC+1 → UTC±0)
  • Mar 28, 2027: clocks go forward 1 hour at 1:00 AM (UTC±0 → UTC+1)

Where these clocks are used

  • UK time (GMT/BST): London, Edinburgh, Dublin and Lisbon keep the same clock. IANA zone Europe/London.
  • Coordinated Universal Time (UTC): servers, aviation and logs worldwide; the same clock as GMT. IANA zone Etc/UTC.

Questions

What time is it in UTC when it is 9 AM GMT?

On Oct 23, 2026, 9:00 AM BST is 8:00 AM UTC. On other dates the answer can shift by an hour because of daylight saving time; the table of periods on this page gives each one.

How many hours behind GMT is UTC?

It depends on the date. Oct 23, 2026 to Oct 25, 2026: UTC is 1 hour behind. Oct 25, 2026 to Mar 28, 2027: UTC is same time. Mar 28, 2027 onwards: UTC is 1 hour behind.

Do GMT and UTC observe daylight saving time?

UK time switches to BST (UTC+1) in summer and back to GMT (UTC±0) in winter. Coordinated Universal Time stays on UTC±0 all year.

What is the best time for a meeting between GMT and UTC?

Normal 9-to-5 working hours overlap for 8 hours on a weekday: 9:00 AM–5:00 PM GMT, which is 9:00 AM–5:00 PM UTC.

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Related conversions

Computed from the IANA time zone database on Oct 23, 2026. Live clocks and the converter use your browser's copy of the same data.