GMT to TRT Time Converter

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

London · Greenwich Mean Time
11:16:44
Tuesday, May 12, 2026
GMT+1 · UTC+01:00
Istanbul · Turkey Time
13:16:44
Tuesday, May 12, 2026
GMT+3 · UTC+03:00

Convert a specific time

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

Daylight Saving status right now

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
TRT (Turkey Time)
Observes DST
No

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 GMT and TRT 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
GMT
TRT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in London (GMT). 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: 09:00–14:00 GMT (11:00–16:00 TRT).

Hour-by-hour GMT to TRT conversion table

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

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

Sun today in London and Istanbul

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

Related converters

TRT to GMT (reverse)GMT to ESTGMT to PSTGMT to UTCGMT to CETGMT to ISTEST to TRTPST to TRTUTC to TRTCET to TRTIST to TRT
Looking for local time? See time in London or time in Istanbul.

Frequently asked questions

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