Rio de Janeiro to San Marcos, TX: time difference
San Marcos, TX 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 14:48 2:48 PM San Marcos, TX 12:48 12:48 PM You –:–
14:48 2:48 PM
Brasilia Standard Time · UTC-3
☀️ 05:19 · 🌙 17:59
12:48 12:48 PM
Central Daylight Time · UTC-5
☀️ 07:36 · 🌙 18:59
·
−2 h
San Marcos, TX is 2 h behind Rio de Janeiro.
When you, Rio de Janeiro and San Marcos, TX 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
🇺🇸 San Marcos, TX
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 | 🇺🇸 San Marcos, TX |
|---|---|---|
| Local time | 14:48 | 12:48 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 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 | 05:19 | 07:36 |
| Sunset | 17:59 | 18:59 |
| Daylight | 12 h 40 min | 11 h 23 min |
| People on this clock | 6,211,223 | 44,894 |
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 San Marcos, TX: common questions
How far behind Rio de Janeiro is San Marcos, TX?
San Marcos is 2 hours behind Rio de Janeiro: UTC−5 against UTC−3.
If it is 9:00 AM in Rio de Janeiro, what time is it in San Marcos, TX?
At 9:00 AM in Rio de Janeiro, clocks in San Marcos show 7:00 AM.
What time is it in San Marcos, TX, at the end of the working day in Rio de Janeiro?
The working day in Rio de Janeiro ends at 6:00 PM; in San Marcos it is 4:00 PM at that moment.
Is there a time when both Rio de Janeiro and San Marcos, TX, are at work?
Yes: from 11:00 AM to 6:00 PM in Rio de Janeiro (9:00 AM to 4:00 PM in San Marcos), the working days (9:00 AM–6:00 PM) overlap.
Until what time in Rio de Janeiro is it still yesterday in San Marcos, TX?
Before 2:00 AM in Rio de Janeiro, the date in San Marcos has not changed yet. From 10:00 PM in San Marcos, it is already the next day in Rio de Janeiro.
Does the time difference between Rio de Janeiro and San Marcos, TX, change?
Yes. The clocks change only in San Marcos. From November 1, 2026, San Marcos will be 3 hours behind Rio de Janeiro.
