Portsmouth, NH to Rio de Janeiro: time difference
Rio de Janeiro is 1 h ahead of Portsmouth, NH. 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.
Portsmouth, NH 04:15 4:15 AM Rio de Janeiro 05:15 5:15 AM You –:–
04:15 4:15 AM
Eastern Daylight Time · UTC-4
☀️ 07:02 · 🌙 17:55
05:15 5:15 AM
Brasilia Standard Time · UTC-3
☀️ 05:18 · 🌙 17:59
·
+1 h
Rio de Janeiro is 1 h ahead of Portsmouth, NH.
When you, Portsmouth, NH 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
🇺🇸 Portsmouth, NH
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
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Time zones side by side
| Detail | 🇺🇸 Portsmouth, NH | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 04:15 | 05:15 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | Eastern Daylight Time | Brasilia Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Portsmouth, NH | — | +1 h |
| IANA zone | America/New York | America/Sao Paulo |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | Not observed |
| Sunrise | 07:02 | 05:18 |
| Sunset | 17:55 | 17:59 |
| Daylight | 10 h 54 min | 12 h 41 min |
| People on this clock | 95,535 | 6,211,223 |
Compare Portsmouth, NH with another city
More comparisons with Portsmouth, NH: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Portsmouth, NH and Rio de Janeiro: common questions
What is the time difference between Portsmouth, NH, and Rio de Janeiro?
Rio de Janeiro is 1 hour ahead: it uses UTC−3, while Portsmouth is on UTC−4.
If it is 9:00 AM in Portsmouth, NH, what time is it in Rio de Janeiro?
At 9:00 AM in Portsmouth, clocks in Rio de Janeiro show 10:00 AM.
If it is 6:00 PM in Portsmouth, NH, what time is it in Rio de Janeiro?
At 6:00 PM in Portsmouth, clocks in Rio de Janeiro show 7:00 PM.
Is there a time when both Portsmouth, NH, and Rio de Janeiro are at work?
Yes: from 9:00 AM to 5:00 PM in Portsmouth (10:00 AM to 6:00 PM in Rio de Janeiro), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Rio de Janeiro compared with Portsmouth, NH?
The new day starts in Rio de Janeiro earlier: at 11:00 PM in Portsmouth it is already midnight there. Until 1:00 AM in Rio de Janeiro, Portsmouth is still on the previous day.
Is the time difference between Portsmouth, NH, and Rio de Janeiro the same all year?
No. Only Portsmouth switches to summer time, so the gap changes twice a year. From November 1, 2026, Rio de Janeiro will be 2 hours ahead of Portsmouth.
