Guarulhos to Reykjavik: time difference
Reykjavik is 3 h ahead of Guarulhos. 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.
Guarulhos 00:37 12:37 AM Reykjavik 03:37 3:37 AM You –:–
00:37 12:37 AM
Brasilia Standard Time · UTC-3
☀️ 05:31 · 🌙 18:12
03:37 3:37 AM
Greenwich Mean Time · UTC+0
☀️ 08:27 · 🌙 18:00
·
+3 h
Reykjavik is 3 h ahead of Guarulhos.
When you, Guarulhos and Reykjavik are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇧🇷 Guarulhos
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
🇮🇸 Reykjavik
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 0 12 AM 1 1 AM 2 2 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇧🇷 Guarulhos | 🇮🇸 Reykjavik |
|---|---|---|
| Local time | 00:37 | 03:37 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Brasilia Standard Time | Greenwich Mean Time |
| UTC offset | UTC-3 | UTC+0 |
| Offset from Guarulhos | — | +3 h |
| IANA zone | America/Sao Paulo | Atlantic/Reykjavik |
| Daylight saving | Not observed | Not observed |
| Sunrise | 05:31 | 08:27 |
| Sunset | 18:12 | 18:00 |
| Daylight | 12 h 41 min | 9 h 33 min |
| People on this clock | 1,291,771 | 136,894 |
Compare Guarulhos with another city
More comparisons with Guarulhos: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Guarulhos and Reykjavik: common questions
What is the time difference between Guarulhos and Reykjavik?
Reykjavik is 3 hours ahead: it uses UTC+0, while Guarulhos is on UTC−3.
What time is it in Reykjavik at the start of the working day in Guarulhos?
The working day in Guarulhos starts at 9:00 AM; in Reykjavik it is 12:00 PM at that moment.
If it is 6:00 PM in Guarulhos, what time is it in Reykjavik?
At 6:00 PM in Guarulhos, clocks in Reykjavik show 9:00 PM.
When do working hours in Guarulhos and in Reykjavik overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 3:00 PM in Guarulhos, which is 12:00 PM to 6:00 PM in Reykjavik.
When does the date change in Reykjavik compared with Guarulhos?
The new day starts in Reykjavik earlier: at 9:00 PM in Guarulhos it is already midnight there. Until 3:00 AM in Reykjavik, Guarulhos is still on the previous day.
Is the time difference between Guarulhos and Reykjavik the same all year?
Yes. Neither Guarulhos nor Reykjavik switches to summer time, so the gap is always 3 hours.
