Time difference between Rio das Ostras and Chicago
Chicago is 2 hours behind Rio das Ostras.
Local time in both cities
Rio das Ostras · Brazil
03:54
Chicago · United States
01:54
Chicago is 2 hours behind Rio das Ostras.
same day
Time zones
| Rio das Ostras | America/Sao_Paulo · UTC-03:00 |
|---|---|
| Chicago | America/Chicago · UTC-05:00 |
Rio das Ostras does not observe daylight saving and stays on UTC-03:00 all year.
Chicago is currently on daylight saving time (UTC-05:00). Next change: 2026-11-01 01:00.
Hour-by-hour conversion
Calculated for 2026-09-21 local time in Rio das Ostras. The two places start and end daylight saving on different dates, so another day can give a different result.
| Rio das Ostras (source) | Chicago (target) |
|---|---|
| 00:00 | 22:00 prev day |
| 01:00 | 23:00 prev day |
| 02:00 | 00:00 |
| 03:00 | 01:00 |
| 04:00 | 02:00 |
| 05:00 | 03:00 |
| 06:00 | 04:00 |
| 07:00 | 05:00 |
| 08:00 | 06:00 |
| 09:00 | 07:00 |
| 10:00 | 08:00 |
| 11:00 | 09:00 |
| 12:00 | 10:00 |
| 13:00 | 11:00 |
| 14:00 | 12:00 |
| 15:00 | 13:00 |
| 16:00 | 14:00 |
| 17:00 | 15:00 |
| 18:00 | 16:00 |
| 19:00 | 17:00 |
| 20:00 | 18:00 |
| 21:00 | 19:00 |
| 22:00 | 20:00 |
| 23:00 | 21:00 |
Other common differences from Rio das Ostras
FAQ
- How many hours apart are Rio das Ostras and Chicago right now?
- The answer at the top of the page is calculated for the current moment and states which side is ahead. The gap changes during the year, because the two places usually start and end daylight saving on different dates.
- Is this difference the same all year?
- Not necessarily. Rio das Ostras uses America/Sao_Paulo and Chicago uses America/Chicago; if either observes daylight saving, the gap shifts during the year. Use “Convert a specific date and time” below to calculate it for a given day.
- How do I read the conversion table?
- The left column lists each whole hour in Rio das Ostras; the right column is the local time in Chicago at that same instant, with date rollovers marked. On the day clocks jump forward, some hours do not exist locally — the table says so instead of showing a plausible but wrong value.