San Marcos, TX to Buenos Aires: time difference
Buenos Aires 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 09:18 9:18 AM Buenos Aires 11:18 11:18 AM You –:–
09:18 9:18 AM
Central Daylight Time · UTC-5
☀️ 07:36 · 🌙 18:59
11:18 11:18 AM
Argentina Standard Time · UTC-3
☀️ 06:09 · 🌙 19:11
·
+2 h
Buenos Aires is 2 h ahead of San Marcos, TX.
When you, San Marcos, TX and Buenos Aires 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
🇦🇷 Buenos Aires
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 | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 09:18 | 11:18 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Central Daylight Time | Argentina Standard Time |
| UTC offset | UTC-5 | UTC-3 |
| Offset from San Marcos, TX | — | +2 h |
| IANA zone | America/Chicago | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC-6, Nov 1, 01:00 | Not observed |
| Sunrise | 07:36 | 06:09 |
| Sunset | 18:59 | 19:11 |
| Daylight | 11 h 23 min | 13 h 2 min |
| People on this clock | 44,894 | 2,891,082 |
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 Buenos Aires: common questions
How far ahead of San Marcos, TX, is Buenos Aires?
Buenos Aires is 2 hours ahead of San Marcos: UTC−3 against UTC−5.
What time is it in Buenos Aires at the start of the working day in San Marcos, TX?
The working day in San Marcos starts at 9:00 AM; in Buenos Aires it is 11:00 AM at that moment.
If it is 6:00 PM in San Marcos, TX, what time is it in Buenos Aires?
At 6:00 PM in San Marcos, clocks in Buenos Aires show 8:00 PM.
When do working hours in San Marcos, TX, and in Buenos Aires overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 4:00 PM in San Marcos, which is 11:00 AM to 6:00 PM in Buenos Aires.
When is it already the next day in Buenos Aires?
From 10:00 PM in San Marcos, TX, it is already the next day in Buenos Aires. The other way round, until 2:00 AM in Buenos Aires it is still the previous day in San Marcos.
Is the time difference between San Marcos, TX, and Buenos Aires the same all year?
No. Only San Marcos switches to summer time, so the gap changes twice a year. From November 1, 2026, Buenos Aires will be 3 hours ahead of San Marcos.
