Dartmouth to Rio de Janeiro: time difference
Rio de Janeiro is 1 h ahead of Dartmouth. Live clocks for both, the working hours they share, and how each one sits against your own time.
+1 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Dartmouth 13:17 1:17 PM Rio de Janeiro 14:17 2:17 PM You –:–
13:17 1:17 PM
Atlantic Standard Time · UTC-4
☀️ 06:59 · 🌙 16:58
14:17 2:17 PM
Brasilia Standard Time · UTC-3
☀️ 05:06 · 🌙 18:09
·
+1 h
Rio de Janeiro is 1 h ahead of Dartmouth.
When you, Dartmouth and Rio de Janeiro are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇨🇦 Dartmouth
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
🇧🇷 Rio de Janeiro
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 0 12 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇨🇦 Dartmouth | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 13:17 | 14:17 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Atlantic Standard Time | Brasilia Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Dartmouth | — | +1 h |
| IANA zone | America/Halifax | America/Sao Paulo |
| Daylight saving | On standard time → UTC-3, Mar 14, 03:00 | Not observed |
| Sunrise | 06:59 | 05:06 |
| Sunset | 16:58 | 18:09 |
| Daylight | 9 h 59 min | 13 h 3 min |
| People on this clock | 70,000 | 6,211,223 |
Compare Dartmouth with another city
More comparisons with Dartmouth: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Dartmouth and Rio de Janeiro: common questions
What is the time difference between Dartmouth and Rio de Janeiro?
Rio de Janeiro is 1 hour ahead: it uses UTC−3, while Dartmouth is on UTC−4.
What time is it in Rio de Janeiro at the start of the working day in Dartmouth?
The working day in Dartmouth starts at 9:00 AM; in Rio de Janeiro it is 10:00 AM at that moment.
What time is it in Rio de Janeiro when it is 6:00 PM in Dartmouth?
When it is 6:00 PM in Dartmouth, it is 7:00 PM in Rio de Janeiro.
When is a good time to call Rio de Janeiro from Dartmouth?
Between 9:00 AM and 5:00 PM in Dartmouth – that is 10:00 AM to 6:00 PM in Rio de Janeiro – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Rio de Janeiro compared with Dartmouth?
The new day starts in Rio de Janeiro earlier: at 11:00 PM in Dartmouth it is already midnight there. Until 1:00 AM in Rio de Janeiro, Dartmouth is still on the previous day.
Does the time difference between Dartmouth and Rio de Janeiro change?
Yes. The clocks change only in Dartmouth. From March 14, 2027, Rio de Janeiro and Dartmouth will have the same time.
