London to Cilaos: time difference
Cilaos is 4 h ahead of London. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
London 19:30 7:30 PM Cilaos 23:30 11:30 PM You –:–
19:30 7:30 PM
Greenwich Mean Time · UTC+0
☀️ 07:03 · 🌙 16:27
23:30 11:30 PM
Réunion Time · UTC+4
☀️ 05:34 · 🌙 18:32
·
+4 h
Cilaos is 4 h ahead of London.
When you, London and Cilaos are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇬🇧 London
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇷🇪 Cilaos
4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇧 London | 🇷🇪 Cilaos |
|---|---|---|
| Local time | 19:30 | 23:30 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Greenwich Mean Time | Réunion Time |
| UTC offset | UTC+0 | UTC+4 |
| Offset from London | — | +4 h |
| IANA zone | Europe/London | Indian/Reunion |
| Daylight saving | On standard time → UTC+1, Mar 28, 02:00 | Not observed |
| Sunrise | 07:03 | 05:34 |
| Sunset | 16:27 | 18:32 |
| Daylight | 9 h 24 min | 12 h 58 min |
| People on this clock | 8,908,083 | 5,500 |
Compare London with another city
More comparisons with London: the time zones next to it and the far side of the clock.
Big time differences
London and Cilaos: common questions
What is the time difference between London and Cilaos?
Cilaos is 4 hours ahead: it uses UTC+4, while London is on UTC+0.
What time is it in Cilaos at the start of the working day in London?
The working day in London starts at 9:00 AM; in Cilaos it is 1:00 PM at that moment.
What time is it in Cilaos when it is 6:00 PM in London?
When it is 6:00 PM in London, it is 10:00 PM in Cilaos.
When is a good time to call Cilaos from London?
Between 9:00 AM and 2:00 PM in London – that is 1:00 PM to 6:00 PM in Cilaos – both places are within working hours (9:00 AM–6:00 PM).
When is it already the next day in Cilaos?
From 8:00 PM in London it is already the next day in Cilaos. The other way round, until 4:00 AM in Cilaos it is still the previous day in London.
Does the time gap between London and Cilaos change during the year?
Yes – daylight saving time is used in London but not in Cilaos. From March 28, 2027, Cilaos will be 3 hours ahead of London.
