Istanbul Time to BST Converter
GMT is 3 hours behind TRT. 9:00 AM TRT = 6:00 AM GMT.
GMT is 3 hours behind TRT at the moment. To convert Istanbul Time to BST, subtract 3 hours from the Istanbul Time time: 9:00 AM TRT = 6:00 AM GMT.
Istanbul Time (Istanbul time) is used in Istanbul, Turkey. BST (British Time) is used in United Kingdom from late March to late October.
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.
Istanbul Time to BST time conversion table
Istanbul Time to BST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| Istanbul Time | BST |
|---|---|
| 12:00 AM | 9:00 PM−1 |
| 1:00 AM | 10:00 PM−1 |
| 2:00 AM | 11:00 PM−1 |
| 3:00 AM | 12:00 AM |
| 4:00 AM | 1:00 AM |
| 5:00 AM | 2:00 AM |
| 6:00 AM | 3:00 AM |
| 7:00 AM | 4:00 AM |
| Istanbul Time | BST |
|---|---|
| 8:00 AM | 5:00 AM |
| 9:00 AM | 6:00 AM |
| 10:00 AM | 7:00 AM |
| 11:00 AM | 8:00 AM |
| 12:00 PM | 9:00 AM |
| 1:00 PM | 10:00 AM |
| 2:00 PM | 11:00 AM |
| 3:00 PM | 12:00 PM |
| Istanbul Time | BST |
|---|---|
| 4:00 PM | 1:00 PM |
| 5:00 PM | 2:00 PM |
| 6:00 PM | 3:00 PM |
| 7:00 PM | 4:00 PM |
| 8:00 PM | 5:00 PM |
| 9:00 PM | 6:00 PM |
| 10:00 PM | 7:00 PM |
| 11:00 PM | 8:00 PM |
Conversion table from Istanbul Time to BST 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 BST, −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 Istanbul Time to BST
Subtract 3 hours from the Istanbul Time time to get BST.
Example: 9:00 AM TRT = 6:00 AM GMT.
Across midnight: 1:00 AM TRT = 10:00 PM GMT (previous day). The date changes, so always check the day as well as the hour.
Time difference between Istanbul Time and BST
The time difference between Istanbul Time and BST 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: BST is 3 hours behind of Istanbul Time.
- 29 Mar 2026 – 24 Oct 2026: BST is 2 hours behind of Istanbul Time.
- 25 Oct 2026 – 31 Dec 2026: BST is 3 hours behind of Istanbul Time.
Istanbul Time and BST during daylight saving time
- Istanbul Time does not observe daylight saving time; it stays on UTC+3 all year.
- 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).
Best time for a meeting between Istanbul Time and BST
Istanbul Time and BST share 5 hours of the 9 AM–5 PM working day. Any time between 12:00 PM and 5:00 PM TRT lands between 9:00 AM and 2:00 PM GMT, inside working hours for both.
Istanbul Time to BST FAQ
What is the time difference between Istanbul Time and BST?
Right now GMT is 3 hours behind TRT. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM Istanbul Time in BST?
9:00 AM TRT is 6:00 AM GMT.
What is 12 PM (noon) Istanbul Time in BST?
12:00 PM TRT is 9:00 AM GMT.
Is BST ahead of or behind Istanbul Time?
GMT is 3 hours behind TRT, so it is earlier in BST than in Istanbul 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.
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.
What is the best time for a meeting between Istanbul Time and BST?
Istanbul Time and BST share 5 hours of the 9 AM–5 PM working day. Any time between 12:00 PM and 5:00 PM TRT lands between 9:00 AM and 2:00 PM GMT, inside working hours for both.
Related conversions
Convert BST to Istanbul Time
Convert Istanbul Time to other time zones
Convert other time zones to BST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.