Charlestown to Rio de Janeiro: time difference
Rio de Janeiro is 1 h ahead of Charlestown. 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.
Charlestown 10:25 10:25 AM Rio de Janeiro 11:25 11:25 AM You –:–
10:25 10:25 AM
Atlantic Standard Time · UTC-4
☀️ 06:03 · 🌙 17:53
11:25 11:25 AM
Brasilia Standard Time · UTC-3
☀️ 05:26 · 🌙 17:55
·
+1 h
Rio de Janeiro is 1 h ahead of Charlestown.
When you, Charlestown 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
🇰🇳 Charlestown
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 | 🇰🇳 Charlestown | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 10:25 | 11:25 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Atlantic Standard Time | Brasilia Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Charlestown | — | +1 h |
| IANA zone | America/St Kitts | America/Sao Paulo |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:03 | 05:26 |
| Sunset | 17:53 | 17:55 |
| Daylight | 11 h 51 min | 12 h 30 min |
| People on this clock | 1,500 | 6,211,223 |
Compare Charlestown with another city
More comparisons with Charlestown: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Charlestown and Rio de Janeiro: common questions
How many hours ahead of Charlestown is Rio de Janeiro?
The clocks in Rio de Janeiro are 1 hour ahead of those in Charlestown (UTC−3 and UTC−4).
What time is it in Rio de Janeiro when it is 9:00 AM in Charlestown?
When it is 9:00 AM in Charlestown, 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 Charlestown?
The working day in Charlestown ends at 6:00 PM; in Rio de Janeiro it is 7:00 PM at that moment.
When do working hours in Charlestown and in Rio de Janeiro overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 5:00 PM in Charlestown, which is 10:00 AM to 6:00 PM in Rio de Janeiro.
From what time in Charlestown is it tomorrow in Rio de Janeiro?
Once it is 11:00 PM in Charlestown, the date in Rio de Janeiro has already changed. Until 1:00 AM in Rio de Janeiro, it is still the previous day in Charlestown.
Does the time difference between Charlestown and Rio de Janeiro change?
No. Neither place uses daylight saving time, so the difference stays 1 hour all year.
