World Timezones

GMT to UTC Converter

Compare UTC to GMT instead
Greenwich Mean Time5:35 amFri, Jun 5
Greenwich Mean TimeBST
Europe · UTC+1
5:35 amFri, Jun 5
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Coordinated Universal TimeUTC
Global · UTC
4:35 amFri, Jun 5
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Offset

The time difference between Greenwich Mean Time and Coordinated Universal Time is 1 hour.

1 hour

Greenwich Mean Time (BST) is ahead of Coordinated Universal Time (UTC).

BST: UTC+1

UTC: UTC

Greenwich Mean Time is currently observing daylight saving time; Coordinated Universal Time is not.

When to schedule

Business-hours overlap: 10 AM–5 PM in Greenwich Mean Time (9 AM–4 PM in Coordinated Universal Time).

Both teams are in working hours during this window on weekdays.

Suggested time: 1:00 PM Greenwich Mean Time (12:00 PM Coordinated Universal Time).

This window may shift by an hour during daylight saving time.

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

United Kingdom

  • Good FridayFri, Apr 3
  • Early May Bank HolidayMon, May 4
  • Spring Bank HolidayMon, May 25
  • Christmas DayFri, Dec 25
  • St. Stephen's DayMon, Dec 28

About these zones

Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.

Coordinated Universal Time is also known as UTC.

Coordinated Universal Time is approximately 3,550 miles south of Greenwich Mean Time.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

GMTUTCDay
12:00 am11:00 pm-1 day
1:00 am12:00 amSame day
2:00 am1:00 amSame day
3:00 am2:00 amSame day
4:00 am3:00 amSame day
5:00 am4:00 amSame day
6:00 am5:00 amSame day
7:00 am6:00 amSame day
8:00 am7:00 amSame day
9:00 am8:00 amSame day
10:00 am9:00 amSame day
11:00 am10:00 amSame day
12:00 pm11:00 amSame day
1:00 pm12:00 pmSame day
2:00 pm1:00 pmSame day
3:00 pm2:00 pmSame day
4:00 pm3:00 pmSame day
5:00 pm4:00 pmSame day
6:00 pm5:00 pmSame day
7:00 pm6:00 pmSame day
8:00 pm7:00 pmSame day
9:00 pm8:00 pmSame day
10:00 pm9:00 pmSame day
11:00 pm10:00 pmSame day

Daylight saving time

Greenwich Mean Time observes daylight saving time; Coordinated Universal Time does not. The offset between the two zones changes when Greenwich Mean Time transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Greenwich Mean Time
Sunrise
4:47 AM
Sunset
9:13 PM
Day length
16h 25m
Coordinated Universal Time
Sunrise
5:56 AM
Sunset
6:03 PM
Day length
12h 7m

Daylight overlap: 12h 7m — 6:56 AM–7:03 PM in Greenwich Mean Time (5:56 AM–6:03 PM in Coordinated Universal Time). Both locations are in daylight during this window.

Cities in these zones

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Greenwich Mean Time

  • LCY
  • LGW
  • LHR
  • LTN
  • STN
  • BHX
  • EMA
  • GLA
  • PIK
  • LBA

Related conversions

Common conversions

What is 9:00 am GMT in UTC?
9:00 am GMT is 8:00 am UTC.
What is 12:00 pm GMT in UTC?
12:00 pm GMT is 11:00 am UTC.
What is 12:30 pm GMT in UTC?
12:30 pm GMT is 11:30 am UTC.
What is 2:00 pm GMT in UTC?
2:00 pm GMT is 1:00 pm UTC.
What is 5:00 pm GMT in UTC?
5:00 pm GMT is 4:00 pm UTC.
What is 11:30 pm GMT in UTC?
11:30 pm GMT is 10:30 pm UTC.