BST 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 at the moment. To convert BST to Istanbul Time, add 3 hours to the BST time: 9:00 AM GMT = 12:00 PM TRT.
BST (British Time) is used in United Kingdom from late March to late October. Istanbul Time (Istanbul time) is used in Istanbul, Turkey.
BST here means British Summer Time, not Bangladesh Standard Time. BST (British Summer Time) is not in force right now: United Kingdom from late March to late October is currently on GMT. This page uses whichever name applies on the date you pick, so the numbers below say GMT.
BST to Istanbul Time time conversion table
BST to Istanbul Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| BST | Istanbul Time |
|---|---|
| 12:00 AM | 3:00 AM |
| 1:00 AM | 4:00 AM |
| 2:00 AM | 5:00 AM |
| 3:00 AM | 6:00 AM |
| 4:00 AM | 7:00 AM |
| 5:00 AM | 8:00 AM |
| 6:00 AM | 9:00 AM |
| 7:00 AM | 10:00 AM |
| BST | Istanbul Time |
|---|---|
| 8:00 AM | 11:00 AM |
| 9:00 AM | 12:00 PM |
| 10:00 AM | 1:00 PM |
| 11:00 AM | 2:00 PM |
| 12:00 PM | 3:00 PM |
| 1:00 PM | 4:00 PM |
| 2:00 PM | 5:00 PM |
| 3:00 PM | 6:00 PM |
| BST | Istanbul Time |
|---|---|
| 4:00 PM | 7:00 PM |
| 5:00 PM | 8:00 PM |
| 6:00 PM | 9:00 PM |
| 7:00 PM | 10:00 PM |
| 8:00 PM | 11:00 PM |
| 9:00 PM | 12:00 AM+1 |
| 10:00 PM | 1:00 AM+1 |
| 11:00 PM | 2:00 AM+1 |
Conversion table from BST to Istanbul Time for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in Istanbul Time, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert BST to Istanbul Time
Add 3 hours to the BST 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 BST and Istanbul Time
The time difference between BST and Istanbul Time is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 28 Mar 2026: Istanbul Time is 3 hours ahead of BST.
- 29 Mar 2026 – 24 Oct 2026: Istanbul Time is 2 hours ahead of BST.
- 25 Oct 2026 – 31 Dec 2026: Istanbul Time is 3 hours ahead of BST.
BST and Istanbul Time during daylight saving time
- BST next changes on 28 Mar 2027: clocks go forward one hour at 00:59 local time, from GMT (UTC+0) to BST (UTC+1).
- Istanbul Time does not observe daylight saving time; it stays on UTC+3 all year.
Best time for a meeting between BST and Istanbul Time
BST 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.
BST to Istanbul Time FAQ
What is the time difference between BST and Istanbul Time?
Right now TRT is 3 hours ahead of GMT. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM BST in Istanbul Time?
9:00 AM GMT is 12:00 PM TRT.
What is 12 PM (noon) BST in Istanbul Time?
12:00 PM GMT is 3:00 PM TRT.
Is Istanbul Time ahead of or behind BST?
TRT is 3 hours ahead of GMT, so it is later in Istanbul Time than in BST.
Does BST change for daylight saving time?
Yes. BST next changes on 28 Mar 2027, when clocks go forward one hour from GMT to BST.
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 BST and Istanbul Time?
BST 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 BST
Convert BST to other time zones
Convert other time zones to Istanbul Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.