What is TRT in BST?

British Time is 3 hours behind

Turkey Time is on UTC+3:00 and British Time is on UTC+0:00 right now. The gap changes during the year — see below.

Convert a time

TRT — Turkey Time

GMT — British Time

8:00 am

GMT, Sat

Time in Istanbul: 11:29:12 AM
Time in London: 8:29:12 AM
Difference: −3 h
Next clock change: March 28, 2027

When the difference changes

Turkey Time and British Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:

Now – March 28, 2027British Time is 3 hours behind
March 28, 2027 – October 31, 2027British Time is 2 hours behind
October 31, 2027 – onwardsBritish Time is 3 hours behind

Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.

Daylight saving

Turkey Time

No clock changes

Turkey Time stays on TRT all year, so its offset from UTC never moves.

British Time

Sunday, March 28, 2027

Clocks go forward one hour — 1:00 am becomes 2:00 am local time, and the zone is on BST after that.

TRT to BST conversion table

Every hour of Saturday, November 7, 2026, converted from Turkey Time to British Time. 3 of the 24 hours fall on a different calendar day in London, which is marked.

12:00 am TRT: 9:00 pm GMT−1 day
1:00 am TRT: 10:00 pm GMT−1 day
2:00 am TRT: 11:00 pm GMT−1 day
3:00 am TRT: 12:00 am GMT
4:00 am TRT: 1:00 am GMT
5:00 am TRT: 2:00 am GMT
6:00 am TRT: 3:00 am GMT
7:00 am TRT: 4:00 am GMT
8:00 am TRT: 5:00 am GMT
9:00 am TRT: 6:00 am GMT
10:00 am TRT: 7:00 am GMT
11:00 am TRT: 8:00 am GMT

12:00 pm TRT: 9:00 am GMT
1:00 pm TRT: 10:00 am GMT
2:00 pm TRT: 11:00 am GMT
3:00 pm TRT: 12:00 pm GMT
4:00 pm TRT: 1:00 pm GMT
5:00 pm TRT: 2:00 pm GMT
6:00 pm TRT: 3:00 pm GMT
7:00 pm TRT: 4:00 pm GMT
8:00 pm TRT: 5:00 pm GMT
9:00 pm TRT: 6:00 pm GMT
10:00 pm TRT: 7:00 pm GMT
11:00 pm TRT: 8:00 pm GMT

Scheduling between the two

Working hours overlap from 12:00 pm to 6:00 pm TRT, which is 9:00 am to 3:00 pm GMT. Anything inside that window falls in the normal working day at both ends.

A note on BST: it can also mean Bangladesh Standard Time (UTC+6). This page means British Summer Time.

Turkey Time (TRT) is used in all of Türkiye, on a permanent UTC+3 since 2016

British Time (GMT) is used in the whole United Kingdom. In winter the UK is on GMT; from late March to late October it is on BST, an hour ahead.