Rio de Janeiro to Armstrong: time difference
Armstrong is 1 h behind Rio de Janeiro. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Rio de Janeiro 19:23 7:23 PM Armstrong 18:23 6:23 PM You –:–
19:23 7:23 PM
Brasilia Standard Time · UTC-3
☀️ 05:22 · 🌙 17:57
18:23 6:23 PM
Eastern Daylight Time · UTC-4
☀️ 08:17 · 🌙 19:08
·
−1 h
Armstrong is 1 h behind Rio de Janeiro.
When you, Rio de Janeiro and Armstrong are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇧🇷 Rio de Janeiro
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
🇨🇦 Armstrong
23 11 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇧🇷 Rio de Janeiro | 🇨🇦 Armstrong |
|---|---|---|
| Local time | 19:23 | 18:23 |
| Local date | Wednesday, October 14, 2026 | Wednesday, October 14, 2026 |
| Time zone | Brasilia Standard Time | Eastern Daylight Time |
| UTC offset | UTC-3 | UTC-4 |
| Offset from Rio de Janeiro | — | −1 h |
| IANA zone | America/Sao Paulo | America/Toronto |
| Daylight saving | Not observed | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 05:22 | 08:17 |
| Sunset | 17:57 | 19:08 |
| Daylight | 12 h 35 min | 10 h 51 min |
| People on this clock | 6,211,223 | — |
Compare Rio de Janeiro with another city
More comparisons with Rio de Janeiro: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Rio de Janeiro and Armstrong: common questions
How far behind Rio de Janeiro is Armstrong?
Armstrong is 1 hour behind Rio de Janeiro: UTC−4 against UTC−3.
If it is 9:00 AM in Rio de Janeiro, what time is it in Armstrong?
At 9:00 AM in Rio de Janeiro, clocks in Armstrong show 8:00 AM.
If it is 6:00 PM in Rio de Janeiro, what time is it in Armstrong?
At 6:00 PM in Rio de Janeiro, clocks in Armstrong show 5:00 PM.
When is a good time to call Armstrong from Rio de Janeiro?
Between 10:00 AM and 6:00 PM in Rio de Janeiro – that is 9:00 AM to 5:00 PM in Armstrong – both places are within working hours (9:00 AM–6:00 PM).
Until what time in Rio de Janeiro is it still yesterday in Armstrong?
Before 1:00 AM in Rio de Janeiro, the date in Armstrong has not changed yet. From 11:00 PM in Armstrong, it is already the next day in Rio de Janeiro.
Does the time difference between Rio de Janeiro and Armstrong change?
Yes. The clocks change only in Armstrong. From November 1, 2026, Armstrong will be 2 hours behind Rio de Janeiro.
