The short answer

10pm in British Indian Ocean Territory is 5pm in British Summer Time.

British Indian Ocean Territory is 5 hours ahead of British Summer Time. That's already evening in British Summer Time, after the typical working day ends.

British Indian Ocean Territory
10pm
British Summer Time
5pm
Right now
1:52pm+06:00 · UTC+06:00 · Sun, Aug 30
8:52amBST · UTC+01:00 · Sun, Aug 30
Read across to convert
British Indian Ocean Territory
+06:00 · UTC+06:00
1:52pm ☀
British Summer Time
BST · UTC+01:00
8:52am ☀
Pinned10pmBritish Indian Ocean Territory=5pmBritish Summer Time
12amSun
7pmSat ·−1d
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WORK
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NOW
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PINNED
10pm
5pm
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daylightnightworking hoursoverlap
Best time to meet
Best for a call
British Indian Ocean Territory
2pm–5pm
=
British Summer Time
9am–12pm
Popular conversions

Quick reference.

9amBritish Indian Ocean Territory=4amBritish Summer Time
12pmBritish Indian Ocean Territory=7amBritish Summer Time
3pmBritish Indian Ocean Territory=10amBritish Summer Time
5pmBritish Indian Ocean Territory=12pmBritish Summer Time
9pmBritish Indian Ocean Territory=4pmBritish Summer Time
In context

What each side covers.

1:52pm
Cities on this clock
British Summer Time
BST · UTC+01:00
8:52am
Cities on this clock

Frequently asked

Quick answers about converting between British Indian Ocean Territory and British Summer Time. Can't find what you need? Email [email protected].

What is the time difference between British Indian Ocean Territory and British Summer Time?
British Indian Ocean Territory is 5 hours ahead of British Summer Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.
When it's 10pm in British Indian Ocean Territory, what time is it in British Summer Time?
10pm in British Indian Ocean Territory is 5pm in British Summer Time. That's already evening in British Summer Time, after the typical working day ends. Use the hour-by-hour table above to read any other time across.
What's the best time for a call between British Indian Ocean Territory and British Summer Time?
2pm–5pm in British Indian Ocean Territory lines up with 9am–12pm in British Summer Time — both sides are inside a 9-to-5 working day.
Does this account for daylight saving time?
Yes. We track every clock change in both places, so the abbreviations you see — +06:00 and BST — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.
Why is the date sometimes different on each side?
When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.