Rio de Janeiro to Ann Arbor, MI: time difference
Ann Arbor, MI 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 09:28 9:28 AM Ann Arbor, MI 08:28 8:28 AM You –:–
09:28 9:28 AM
Brasilia Standard Time · UTC-3
☀️ 05:26 · 🌙 17:55
08:28 8:28 AM
Eastern Daylight Time · UTC-4
☀️ 07:43 · 🌙 19:03
·
−1 h
Ann Arbor, MI is 1 h behind Rio de Janeiro.
When you, Rio de Janeiro and Ann Arbor, MI 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
🇺🇸 Ann Arbor, MI
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 | 🇺🇸 Ann Arbor, MI |
|---|---|---|
| Local time | 09:28 | 08:28 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 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/Detroit |
| Daylight saving | Not observed | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 05:26 | 07:43 |
| Sunset | 17:55 | 19:03 |
| Daylight | 12 h 30 min | 11 h 20 min |
| People on this clock | 6,211,223 | 123,851 |
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 Ann Arbor, MI: common questions
How many hours behind Rio de Janeiro is Ann Arbor, MI?
The clocks in Ann Arbor are 1 hour behind those in Rio de Janeiro (UTC−4 and UTC−3).
What time is it in Ann Arbor, MI, when it is 9:00 AM in Rio de Janeiro?
When it is 9:00 AM in Rio de Janeiro, it is 8:00 AM in Ann Arbor.
If it is 6:00 PM in Rio de Janeiro, what time is it in Ann Arbor, MI?
At 6:00 PM in Rio de Janeiro, clocks in Ann Arbor show 5:00 PM.
When is a good time to call Ann Arbor, MI, 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 Ann Arbor – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Ann Arbor, MI, compared with Rio de Janeiro?
The new day starts in Ann Arbor later: until 1:00 AM in Rio de Janeiro, it is still the previous day there. From 11:00 PM in Ann Arbor, Rio de Janeiro is already on the next day.
Is the time difference between Rio de Janeiro and Ann Arbor, MI, the same all year?
No. Only Ann Arbor switches to summer time, so the gap changes twice a year. From November 1, 2026, Ann Arbor will be 2 hours behind Rio de Janeiro.
