🇦🇷 Buenos Aires, Argentina
51
- Argentina Standard Time
- UTC-3
- Golden hour
☀️ 06:09 · 🌙 19:11 · 13 h 2 min
Buenos Aires to San Marcos, TX: time difference
San Marcos, TX is 2 h behind Buenos Aires. 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.
Buenos Aires 18:50 6:50 PM San Marcos, TX 16:50 4:50 PM You –:–
18:50 6:50 PM
Argentina Standard Time · UTC-3
☀️ 06:09 · 🌙 19:11
16:50 4:50 PM
Central Daylight Time · UTC-5
☀️ 07:36 · 🌙 18:59
·
−2 h
San Marcos, TX is 2 h behind Buenos Aires.
When you, Buenos Aires 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
🇦🇷 Buenos Aires
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 | 🇦🇷 Buenos Aires | 🇺🇸 San Marcos, TX |
|---|---|---|
| Local time | 18:50 | 16:50 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Argentina Standard Time | Central Daylight Time |
| UTC offset | UTC-3 | UTC-5 |
| Offset from Buenos Aires | — | −2 h |
| IANA zone | America/Argentina/Buenos Aires | America/Chicago |
| Daylight saving | Not observed | On summer time → UTC-6, Nov 1, 01:00 |
| Sunrise | 06:09 | 07:36 |
| Sunset | 19:11 | 18:59 |
| Daylight | 13 h 2 min | 11 h 23 min |
| People on this clock | 2,891,082 | 44,894 |
Compare Buenos Aires with another city
More comparisons with Buenos Aires: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Buenos Aires and San Marcos, TX: common questions
How many hours behind Buenos Aires is San Marcos, TX?
The clocks in San Marcos are 2 hours behind those in Buenos Aires (UTC−5 and UTC−3).
What time is it in San Marcos, TX, at the start of the working day in Buenos Aires?
The working day in Buenos Aires starts at 9:00 AM; in San Marcos it is 7:00 AM at that moment.
What time is it in San Marcos, TX, at the end of the working day in Buenos Aires?
The working day in Buenos Aires ends at 6:00 PM; in San Marcos it is 4:00 PM at that moment.
When do working hours in Buenos Aires and in San Marcos, TX, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 11:00 AM to 6:00 PM in Buenos Aires, which is 9:00 AM to 4:00 PM in San Marcos.
When is it still the previous day in San Marcos, TX?
Until 2:00 AM in Buenos Aires it is still the previous day in San Marcos. The other way round, from 10:00 PM in San Marcos it is already the next day in Buenos Aires.
Is the time difference between Buenos Aires and San Marcos, TX, the same all year?
No. Only San Marcos switches to summer time, so the gap changes twice a year. From November 1, 2026, San Marcos will be 3 hours behind Buenos Aires.
