Rio de Janeiro to Naperville, IL: time difference
Naperville, IL is 2 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 19:03 7:03 PM Naperville, IL 17:03 5:03 PM You –:–
19:03 7:03 PM
Brasilia Standard Time · UTC-3
☀️ 05:17 · 🌙 18:00
17:03 5:03 PM
Central Daylight Time · UTC-5
☀️ 07:11 · 🌙 18:05
·
−2 h
Naperville, IL is 2 h behind Rio de Janeiro.
When you, Rio de Janeiro and Naperville, IL 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
🇺🇸 Naperville, IL
22 10 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇧🇷 Rio de Janeiro | 🇺🇸 Naperville, IL |
|---|---|---|
| Local time | 19:03 | 17:03 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Brasilia Standard Time | Central Daylight Time |
| UTC offset | UTC-3 | UTC-5 |
| Offset from Rio de Janeiro | — | −2 h |
| IANA zone | America/Sao Paulo | America/Chicago |
| Daylight saving | Not observed | On summer time → UTC-6, Nov 1, 01:00 |
| Sunrise | 05:17 | 07:11 |
| Sunset | 18:00 | 18:05 |
| Daylight | 12 h 43 min | 10 h 54 min |
| People on this clock | 6,211,223 | 149,540 |
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 Naperville, IL: common questions
How many hours behind Rio de Janeiro is Naperville, IL?
The clocks in Naperville are 2 hours behind those in Rio de Janeiro (UTC−5 and UTC−3).
If it is 9:00 AM in Rio de Janeiro, what time is it in Naperville, IL?
At 9:00 AM in Rio de Janeiro, clocks in Naperville show 7:00 AM.
What time is it in Naperville, IL, when it is 6:00 PM in Rio de Janeiro?
When it is 6:00 PM in Rio de Janeiro, it is 4:00 PM in Naperville.
Is there a time when both Rio de Janeiro and Naperville, IL, are at work?
Yes: from 11:00 AM to 6:00 PM in Rio de Janeiro (9:00 AM to 4:00 PM in Naperville), the working days (9:00 AM–6:00 PM) overlap.
When is it still the previous day in Naperville, IL?
Until 2:00 AM in Rio de Janeiro it is still the previous day in Naperville. The other way round, from 10:00 PM in Naperville it is already the next day in Rio de Janeiro.
Is the time difference between Rio de Janeiro and Naperville, IL, the same all year?
No. Only Naperville switches to summer time, so the gap changes twice a year. From November 1, 2026, Naperville will be 3 hours behind Rio de Janeiro.
