1am in British Indian Ocean Territory is 8pm in British Summer Time on the previous day.

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 1am in British Indian Ocean Territory, what time is it in British Summer Time?

1am in British Indian Ocean Territory is 8pm in British Summer Time on the previous day. 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.