Time Difference UK and Sri Lanka
Colombo is 4 hours 30 minutes ahead of London. Because the clocks do not change on the same days, the difference is sometimes 5 hours 30 minutes – the table shows when. When it is 12:00 in London, it is 16:30 in Colombo.
Time difference UK and Sri Lanka to the end of 2027
| Period | Difference |
|---|---|
| 1 Oct 2026 – 25 Oct 2026 | +4 h 30 min |
| 25 Oct 2026 – 28 Mar 2027 | +5 h 30 min |
| 28 Mar 2027 – 31 Oct 2027 | +4 h 30 min |
| 31 Oct 2027 – 31 Dec 2027 | +5 h 30 min |
Convert the time: London → Colombo
| London | Colombo (+4 h 30 min) | Colombo (+5 h 30 min) |
|---|---|---|
| 00:00 | 04:30 | 05:30 |
| 02:00 | 06:30 | 07:30 |
| 04:00 | 08:30 | 09:30 |
| 06:00 | 10:30 | 11:30 |
| 08:00 | 12:30 | 13:30 |
| 10:00 | 14:30 | 15:30 |
| 12:00 | 16:30 | 17:30 |
| 14:00 | 18:30 | 19:30 |
| 16:00 | 20:30 | 21:30 |
| 18:00 | 22:30 | 23:30 |
| 20:00 | 00:30 (+1) | 01:30 (+1) |
| 22:00 | 02:30 (+1) | 03:30 (+1) |
(+1) = next day, (−1) = previous day. One column for each difference in the table above.
Clock changes in 2027
- UK: 28 March (+1 h) and 31 October (−1 h).
- Sri Lanka: no clock change.
Calculate the time difference between any two countries
How it is calculated
We use the IANA time zone database (tzdata), which browsers and operating systems use as well. For every day the UTC offset of both main zones (London and Colombo) is looked up; the difference only changes when one of the countries changes its clocks. In the UK and the EU that happens on the last Sunday of March and October at 01:00 UTC; in the US on the second Sunday of March and the first Sunday of November (15 U.S.C. § 260a).
Limits: countries can change their time rules at short notice; this page shows the time zone database as of the update date. For countries with several time zones the main zone is used; the others are listed in the time zone table.
Frequently asked questions
How many hours is the time difference between the UK and Sri Lanka?
Colombo is 4 hours 30 minutes ahead of London. At times it is 5 hours 30 minutes, because the clocks change on different days.
What time is it in Colombo when it is 12 noon in London?
16:30 – as long as the difference is 4 hours 30 minutes. The conversion table shows every hour.
When does the time difference change?
Up to the end of 2027 on these dates: 25 October 2026: +5 h 30 min; 28 March 2027: +4 h 30 min; 31 October 2027: +5 h 30 min.
Does Sri Lanka observe daylight saving time?
No, Colombo has no clock change in 2027, so the difference to London only changes when London changes its clocks.
Time difference UK – other countries
Sources
- IANA Time Zone Database (tzdata)
- ECMA-402 – Intl.DateTimeFormat, option timeZone
- EUR-Lex – 2000/84/EC (summer time / Sommerzeit)
- 15 U.S.C. § 260a – daylight saving time in the United States (Cornell LII)
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