Reykjavik to Niteroi: time difference
Niteroi is 3 h behind Reykjavik. 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.
Reykjavik 08:38 8:38 AM Niteroi 05:38 5:38 AM You –:–
08:38 8:38 AM
Greenwich Mean Time · UTC+0
☀️ 08:03 · 🌙 18:28
05:38 5:38 AM
Brasilia Standard Time · UTC-3
☀️ 05:25 · 🌙 17:55
·
−3 h
Niteroi is 3 h behind Reykjavik.
When you, Reykjavik and Niteroi are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇮🇸 Reykjavik
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
🇧🇷 Niteroi
21 9 PM 22 10 PM 23 11 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇮🇸 Reykjavik | 🇧🇷 Niteroi |
|---|---|---|
| Local time | 08:38 | 05:38 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Greenwich Mean Time | Brasilia Standard Time |
| UTC offset | UTC+0 | UTC-3 |
| Offset from Reykjavik | — | −3 h |
| IANA zone | Atlantic/Reykjavik | America/Sao Paulo |
| Daylight saving | Not observed | Not observed |
| Sunrise | 08:03 | 05:25 |
| Sunset | 18:28 | 17:55 |
| Daylight | 10 h 25 min | 12 h 30 min |
| People on this clock | 136,894 | 481,749 |
Compare Reykjavik with another city
More comparisons with Reykjavik: the time zones next to it and the far side of the clock.
Big time differences
Reykjavik and Niteroi: common questions
What is the time difference between Reykjavik and Niteroi?
Niteroi is 3 hours behind: it uses UTC−3, while Reykjavik is on UTC+0.
If it is 9:00 AM in Reykjavik, what time is it in Niteroi?
At 9:00 AM in Reykjavik, clocks in Niteroi show 6:00 AM.
What time is it in Niteroi at the end of the working day in Reykjavik?
The working day in Reykjavik ends at 6:00 PM; in Niteroi it is 3:00 PM at that moment.
When is a good time to call Niteroi from Reykjavik?
Between 12:00 PM and 6:00 PM in Reykjavik – that is 9:00 AM to 3:00 PM in Niteroi – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Niteroi compared with Reykjavik?
The new day starts in Niteroi later: until 3:00 AM in Reykjavik, it is still the previous day there. From 9:00 PM in Niteroi, Reykjavik is already on the next day.
Does the time gap between Reykjavik and Niteroi change during the year?
No, the clocks change neither in Reykjavik nor in Niteroi, so the gap is 3 hours all year round.
