Reykjavik to Diadema: time difference
Diadema 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 08:06 8:06 AM Diadema 05:06 5:06 AM You –:–
08:06 8:06 AM
Greenwich Mean Time · UTC+0
☀️ 08:39 · 🌙 17:47
05:06 5:06 AM
Brasilia Standard Time · UTC-3
☀️ 05:28 · 🌙 18:15
·
−3 h
Diadema is 3 h behind Reykjavik.
When you, Reykjavik and Diadema 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
🇧🇷 Diadema
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 | 🇧🇷 Diadema |
|---|---|---|
| Local time | 08:06 | 05:06 |
| Local date | Thursday, October 22, 2026 | Thursday, October 22, 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 | 08:39 | 05:28 |
| Sunset | 17:47 | 18:15 |
| Daylight | 9 h 7 min | 12 h 47 min |
| People on this clock | 136,894 | 393,237 |
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 Diadema: common questions
What is the time difference between Reykjavik and Diadema?
Diadema is 3 hours behind: it uses UTC−3, while Reykjavik is on UTC+0.
What time is it in Diadema at the start of the working day in Reykjavik?
The working day in Reykjavik starts at 9:00 AM; in Diadema it is 6:00 AM at that moment.
What time is it in Diadema at the end of the working day in Reykjavik?
The working day in Reykjavik ends at 6:00 PM; in Diadema it is 3:00 PM at that moment.
Is there a time when both Reykjavik and Diadema are at work?
Yes: from 12:00 PM to 6:00 PM in Reykjavik (9:00 AM to 3:00 PM in Diadema), the working days (9:00 AM–6:00 PM) overlap.
When is it still the previous day in Diadema?
Until 3:00 AM in Reykjavik it is still the previous day in Diadema. The other way round, from 9:00 PM in Diadema it is already the next day in Reykjavik.
Is the time difference between Reykjavik and Diadema the same all year?
Yes. Neither Reykjavik nor Diadema switches to summer time, so the gap is always 3 hours.
