Time difference between Rio das Ostras and Chicago
Chicago is 3 hours behind Rio das Ostras.
Local time in both cities
Rio das Ostras · Brazil
15:50
BrazilChicago · United States
12:50
United StatesChicago is 3 hours behind Rio das Ostras.
same day
Time zones
| Rio das Ostras | America/Sao_Paulo · UTC-03:00 |
|---|---|
| Chicago | America/Chicago · UTC-06:00 |
Rio das Ostras does not observe daylight saving and stays on UTC-03:00 all year.
Chicago is currently on standard time (UTC-06:00). Next change: 2027-03-14 03:00.
Hour-by-hour conversion
Calculated for 2026-11-11 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 | 21:00 prev day |
| 01:00 | 22:00 prev day |
| 02:00 | 23:00 prev day |
| 03:00 | 00:00 |
| 04:00 | 01:00 |
| 05:00 | 02:00 |
| 06:00 | 03:00 |
| 07:00 | 04:00 |
| 08:00 | 05:00 |
| 09:00 | 06:00 |
| 10:00 | 07:00 |
| 11:00 | 08:00 |
| 12:00 | 09:00 |
| 13:00 | 10:00 |
| 14:00 | 11:00 |
| 15:00 | 12:00 |
| 16:00 | 13:00 |
| 17:00 | 14:00 |
| 18:00 | 15:00 |
| 19:00 | 16:00 |
| 20:00 | 17:00 |
| 21:00 | 18:00 |
| 22:00 | 19:00 |
| 23:00 | 20:00 |
Other common differences from Rio das Ostras
FAQ
- How many hours apart are Rio das Ostras and Chicago right now?
- For Rio das Ostras and Chicago, the current difference is -3:00, calculated from today’s time-zone rules. The page shows the local date in both cities on a 24-hour clock. Daylight-saving changes can alter the gap. Use specific-date mode for another day and check for a date rollover rather than carrying today’s offset forward. Verify the intended local date on each side before scheduling, especially when the conversion falls near midnight or the destination observes a different seasonal clock change.
- Does the time difference between Rio das Ostras and Chicago stay constant all year?
- The gap between Rio das Ostras and Chicago does not necessarily stay constant all year. If the two cities change daylight-saving time on different dates, their difference can vary; months 1 and 7 may show different results. Choose the intended date in specific-date mode and check the converted local date. Do not assume that 1 fixed offset applies for every day of the year, particularly when arranging future meetings or reviewing dates near seasonal clock changes.
- How does the hourly table mark date changes and daylight-saving gaps from Rio das Ostras to Chicago?
- The hourly table for Rio das Ostras and Chicago lists corresponding local times for each hour and marks the same instant and any date rollover. It covers 24 hourly slots across 2 cities; a local time skipped by a daylight-saving jump is identified instead of being invented. Check the date and the time zones on both sides when arranging a meeting. Shifting the displayed hour alone can give the wrong local date when the conversion crosses midnight.