San Marcos, TX to Rio de Janeiro: time difference
Rio de Janeiro is 2 h ahead of San Marcos, TX. Live clocks for both, the working hours they share, and how each one sits against your own time.
+2 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
San Marcos, TX 06:19 6:19 AM Rio de Janeiro 08:19 8:19 AM You –:–
06:19 6:19 AM
Central Daylight Time · UTC-5
☀️ 07:36 · 🌙 18:59
08:19 8:19 AM
Brasilia Standard Time · UTC-3
☀️ 05:19 · 🌙 17:59
·
+2 h
Rio de Janeiro is 2 h ahead of San Marcos, TX.
When you, San Marcos, TX and Rio de Janeiro are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇺🇸 San Marcos, TX
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
🇧🇷 Rio de Janeiro
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 0 12 AM 1 1 AM
📍 Your time
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Time zones side by side
| Detail | 🇺🇸 San Marcos, TX | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 06:19 | 08:19 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Central Daylight Time | Brasilia Standard Time |
| UTC offset | UTC-5 | UTC-3 |
| Offset from San Marcos, TX | — | +2 h |
| IANA zone | America/Chicago | America/Sao Paulo |
| Daylight saving | On summer time → UTC-6, Nov 1, 01:00 | Not observed |
| Sunrise | 07:36 | 05:19 |
| Sunset | 18:59 | 17:59 |
| Daylight | 11 h 23 min | 12 h 40 min |
| People on this clock | 44,894 | 6,211,223 |
Compare San Marcos, TX with another city
More comparisons with San Marcos, TX: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
San Marcos, TX and Rio de Janeiro: common questions
What is the time difference between San Marcos, TX, and Rio de Janeiro?
Rio de Janeiro is 2 hours ahead: it uses UTC−3, while San Marcos is on UTC−5.
What time is it in Rio de Janeiro when it is 9:00 AM in San Marcos, TX?
When it is 9:00 AM in San Marcos, it is 11:00 AM in Rio de Janeiro.
What time is it in Rio de Janeiro when it is 6:00 PM in San Marcos, TX?
When it is 6:00 PM in San Marcos, it is 8:00 PM in Rio de Janeiro.
When is a good time to call Rio de Janeiro from San Marcos, TX?
Between 9:00 AM and 4:00 PM in San Marcos – that is 11:00 AM to 6:00 PM in Rio de Janeiro – both places are within working hours (9:00 AM–6:00 PM).
When is it already the next day in Rio de Janeiro?
From 10:00 PM in San Marcos, TX, it is already the next day in Rio de Janeiro. The other way round, until 2:00 AM in Rio de Janeiro it is still the previous day in San Marcos.
Is the time difference between San Marcos, TX, and Rio de Janeiro the same all year?
No. Only San Marcos switches to summer time, so the gap changes twice a year. From November 1, 2026, Rio de Janeiro will be 3 hours ahead of San Marcos.
