TRT to GMT Time Converter

Convert Turkey Time (TRT) to Greenwich Mean Time (GMT). Both time zones are shown live below; current offset between them is 2 hours behind.

Istanbul · Turkey Time
19:07:32
Tuesday, May 12, 2026
GMT+3 · UTC+03:00
London · Greenwich Mean Time
17:07:32
Tuesday, May 12, 2026
GMT+1 · UTC+01:00

Convert a specific time

From: TRT (Istanbul)
To: GMT (London)
--:--

Daylight Saving status right now

TRT (Turkey Time)
Observes DST
No
GMT (Greenwich Mean Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00

Heads up: GMT observes DST while TRT does not. The 2-hour difference shown above will shift by one hour when GMT starts or ends DST.

When can TRT and GMT meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
TRT
GMT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Istanbul (TRT). Each row shows the local working-hours state in that zone for the same moment in time.
6 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 11:00–16:00 TRT (09:00–14:00 GMT).

Hour-by-hour TRT to GMT conversion table

TRT time (Istanbul)GMT time (London)Status
00:00 Tue22:00 MonOff-hours both sides
01:00 Tue23:00 MonOff-hours both sides
02:00 Tue00:00 TueOff-hours both sides
03:00 Tue01:00 TueOff-hours both sides
04:00 Tue02:00 TueOff-hours both sides
05:00 Tue03:00 TueOff-hours both sides
06:00 Tue04:00 TueOff-hours both sides
07:00 Tue05:00 TueOff-hours both sides
08:00 Tue06:00 TueOff-hours both sides
09:00 Tue07:00 TueTRT working
10:00 Tue08:00 TueTRT working
11:00 Tue09:00 TueBoth at work
12:00 Tue10:00 TueBoth at work
13:00 Tue11:00 TueBoth at work
14:00 Tue12:00 TueBoth at work
15:00 Tue13:00 TueBoth at work
16:00 Tue14:00 TueBoth at work
17:00 Tue15:00 TueGMT working
18:00 Tue16:00 TueGMT working
19:00 Tue17:00 TueOff-hours both sides
20:00 Tue18:00 TueOff-hours both sides
21:00 Tue19:00 TueOff-hours both sides
22:00 Tue20:00 TueOff-hours both sides
23:00 Tue21:00 TueOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Turkey Time (TRT)
IANA identifier
Europe/Istanbul
Current UTC offset
UTC+03:00
Current abbreviation
GMT+3
Major cities in this zone
IstanbulAnkara
Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham

Sun today in Istanbul and London

Istanbul
Sunrise
05:50
Sunset
20:12
Solar noon
13:01
Daylight
14h 21m
London
Sunrise
05:14
Sunset
20:41
Solar noon
12:58
Daylight
15h 26m

Related converters

GMT to TRT (reverse)TRT to ESTTRT to PSTTRT to UTCTRT to CETTRT to ISTEST to GMTPST to GMTUTC to GMTCET to GMTIST to GMT
Looking for local time? See time in Istanbul or time in London.

Frequently asked questions

What is the time difference between TRT and GMT right now?+
GMT (Greenwich Mean Time) is currently 2 hours behind TRT (Turkey Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does TRT or GMT observe daylight saving time?+
TRT: does not observe daylight saving time. GMT: observes daylight saving time.
When is the best time to schedule a meeting between TRT and GMT?+
The strongest overlap is 11:00–16:00 TRT (09:00–14:00 GMT), giving 6 hours when both sides are within standard 9am-5pm working hours.
What time is it in London when it is 12:00 noon in Istanbul?+
When it is 12:00 Tue in Istanbul (TRT), it is 10:00 Tue in London (GMT).
Which IANA time zone identifiers are used for TRT and GMT?+
TRT maps to "Europe/Istanbul" in the IANA database. GMT maps to "Europe/London". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Istanbul ahead of or behind London?+
Whether Istanbul (TRT) is ahead of or behind London (GMT) depends on the current UTC offsets. Right now GMT is 2 hours behind TRT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for TRT and GMT?+
TRT is UTC+03:00 (GMT+3) and GMT is UTC+01:00 (GMT+1). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both TRT and GMT?+
Yes. There are 6 hours of overlap during standard 9am-5pm working hours, with the strongest window at 11:00–16:00 TRT.