GMT to Istanbul Time Converter
TRT is 3 hours ahead of GMT. 9:00 AM GMT = 12:00 PM TRT.
TRT is 3 hours ahead of GMT. To convert GMT to Istanbul Time, add 3 hours to the GMT time: 9:00 AM GMT = 12:00 PM TRT.
GMT (GMT) is used in Same offset as UTC. The UK and Ireland use GMT in winter; Iceland, Ghana and Senegal all year. Istanbul Time (Istanbul time) is used in Istanbul, Turkey.
The UK is on GMT only in winter; in summer it uses BST (UTC+1).
GMT to Istanbul Time time conversion table
GMT to Istanbul Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| GMT | Istanbul Time | Day |
|---|---|---|
| 12:00 AM GMT | 3:00 AM TRT | night |
| 1:00 AM GMT | 4:00 AM TRT | night |
| 2:00 AM GMT | 5:00 AM TRT | night |
| 3:00 AM GMT | 6:00 AM TRT | — |
| 4:00 AM GMT | 7:00 AM TRT | — |
| 5:00 AM GMT | 8:00 AM TRT | — |
| 6:00 AM GMT | 9:00 AM TRT | — |
| 7:00 AM GMT | 10:00 AM TRT | — |
| 8:00 AM GMT | 11:00 AM TRT | — |
| 9:00 AM GMT | 12:00 PM TRT | work hours |
| 10:00 AM GMT | 1:00 PM TRT | work hours |
| 11:00 AM GMT | 2:00 PM TRT | work hours |
| 12:00 PM GMT | 3:00 PM TRT | work hours |
| 1:00 PM GMT | 4:00 PM TRT | work hours |
| 2:00 PM GMT | 5:00 PM TRT | — |
| 3:00 PM GMT | 6:00 PM TRT | — |
| 4:00 PM GMT | 7:00 PM TRT | — |
| 5:00 PM GMT | 8:00 PM TRT | — |
| 6:00 PM GMT | 9:00 PM TRT | — |
| 7:00 PM GMT | 10:00 PM TRT | night |
| 8:00 PM GMT | 11:00 PM TRT | night |
| 9:00 PM GMT | 12:00 AM TRT | next day |
| 10:00 PM GMT | 1:00 AM TRT | next day |
| 11:00 PM GMT | 2:00 AM TRT | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert GMT to Istanbul Time
Add 3 hours to the GMT time to get Istanbul Time.
Example: 9:00 AM GMT = 12:00 PM TRT.
Across midnight: 10:00 PM GMT = 1:00 AM TRT (next day). The date changes, so always check the day as well as the hour.
Time difference between GMT and Istanbul Time
The time difference between GMT and Istanbul Time is 3 hours all year – TRT is ahead of GMT.
GMT and Istanbul Time during daylight saving time
- GMT does not observe daylight saving time; it stays on UTC+0 all year.
- Istanbul Time does not observe daylight saving time; it stays on UTC+3 all year.
Best time for a meeting between GMT and Istanbul Time
GMT and Istanbul Time share 5 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 2:00 PM GMT lands between 12:00 PM and 5:00 PM TRT, inside working hours for both.
GMT to Istanbul Time FAQ
What is the time difference between GMT and Istanbul Time?
TRT is 3 hours ahead of GMT all year. 9:00 AM GMT = 12:00 PM TRT.
What is 9 AM GMT in Istanbul Time?
9:00 AM GMT is 12:00 PM TRT.
What is 12 PM (noon) GMT in Istanbul Time?
12:00 PM GMT is 3:00 PM TRT.
Is Istanbul Time ahead of or behind GMT?
TRT is 3 hours ahead of GMT, so it is later in Istanbul Time than in GMT.
Does GMT change for daylight saving time?
No. GMT stays on the same offset all year, so conversions never shift for daylight saving time.
Does Istanbul Time change for daylight saving time?
No. Istanbul Time stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between GMT and Istanbul Time?
GMT and Istanbul Time share 5 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 2:00 PM GMT lands between 12:00 PM and 5:00 PM TRT, inside working hours for both.
Related conversions
Convert Istanbul Time to GMT
Convert GMT to other time zones
Convert other time zones to Istanbul Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.