Amherst, MA to Rio de Janeiro: time difference
Rio de Janeiro is 1 h ahead of Amherst, MA. 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.
Amherst, MA 06:25 6:25 AM Rio de Janeiro 07:25 7:25 AM You –:–
06:25 6:25 AM
Eastern Daylight Time · UTC-4
☀️ 07:07 · 🌙 18:05
07:25 7:25 AM
Brasilia Standard Time · UTC-3
☀️ 05:19 · 🌙 17:59
·
+1 h
Rio de Janeiro is 1 h ahead of Amherst, MA.
When you, Amherst, MA 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
🇺🇸 Amherst, MA
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 | 🇺🇸 Amherst, MA | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 06:25 | 07:25 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Eastern Daylight Time | Brasilia Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Amherst, MA | — | +1 h |
| IANA zone | America/New York | America/Sao Paulo |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | Not observed |
| Sunrise | 07:07 | 05:19 |
| Sunset | 18:05 | 17:59 |
| Daylight | 10 h 58 min | 12 h 40 min |
| People on this clock | 37,819 | 6,211,223 |
Compare Amherst, MA with another city
More comparisons with Amherst, MA: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Amherst, MA and Rio de Janeiro: common questions
What is the time difference between Amherst, MA, and Rio de Janeiro?
Rio de Janeiro is 1 hour ahead: it uses UTC−3, while Amherst is on UTC−4.
What time is it in Rio de Janeiro when it is 9:00 AM in Amherst, MA?
When it is 9:00 AM in Amherst, it is 10:00 AM in Rio de Janeiro.
If it is 6:00 PM in Amherst, MA, what time is it in Rio de Janeiro?
At 6:00 PM in Amherst, clocks in Rio de Janeiro show 7:00 PM.
Is there a time when both Amherst, MA, and Rio de Janeiro are at work?
Yes: from 9:00 AM to 5:00 PM in Amherst (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 Amherst, MA?
The new day starts in Rio de Janeiro earlier: at 11:00 PM in Amherst it is already midnight there. Until 1:00 AM in Rio de Janeiro, Amherst is still on the previous day.
Does the time gap between Amherst, MA, and Rio de Janeiro change during the year?
Yes – daylight saving time is used in Amherst but not in Rio de Janeiro. From November 1, 2026, Rio de Janeiro will be 2 hours ahead of Amherst.
