Stamford, CT to Rio de Janeiro: time difference
Rio de Janeiro is 1 h ahead of Stamford, CT. 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.
Stamford, CT 23:21 11:21 PM Rio de Janeiro 00:21 12:21 AM You –:–
23:21 11:21 PM
Eastern Daylight Time · UTC-4
☀️ 07:09 · 🌙 18:10
00:21 12:21 AM
Brasilia Standard Time · UTC-3
☀️ 05:18 · 🌙 17:59
·
+1 h
Rio de Janeiro is 1 h ahead of Stamford, CT.
When you, Stamford, CT 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
🇺🇸 Stamford, CT
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 | 🇺🇸 Stamford, CT | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 23:21 | 00:21 |
| Local date | Sunday, October 18, 2026 | Monday, October 19, 2026 |
| Time zone | Eastern Daylight Time | Brasilia Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Stamford, CT | — | +1 h |
| IANA zone | America/New York | America/Sao Paulo |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | Not observed |
| Sunrise | 07:09 | 05:18 |
| Sunset | 18:10 | 17:59 |
| Daylight | 11 h 1 min | 12 h 41 min |
| People on this clock | 129,000 | 6,211,223 |
Compare Stamford, CT with another city
More comparisons with Stamford, CT: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Stamford, CT and Rio de Janeiro: common questions
How far ahead of Stamford, CT, is Rio de Janeiro?
Rio de Janeiro is 1 hour ahead of Stamford: UTC−3 against UTC−4.
What time is it in Rio de Janeiro when it is 9:00 AM in Stamford, CT?
When it is 9:00 AM in Stamford, it is 10:00 AM in Rio de Janeiro.
What time is it in Rio de Janeiro at the end of the working day in Stamford, CT?
The working day in Stamford ends at 6:00 PM; in Rio de Janeiro it is 7:00 PM at that moment.
When is a good time to call Rio de Janeiro from Stamford, CT?
Between 9:00 AM and 5:00 PM in Stamford – 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 Stamford, CT?
The new day starts in Rio de Janeiro earlier: at 11:00 PM in Stamford it is already midnight there. Until 1:00 AM in Rio de Janeiro, Stamford is still on the previous day.
Does the time gap between Stamford, CT, and Rio de Janeiro change during the year?
Yes – daylight saving time is used in Stamford but not in Rio de Janeiro. From November 1, 2026, Rio de Janeiro will be 2 hours ahead of Stamford.
