San Antonio, TX to Buenos Aires: time difference
Buenos Aires is 2 h ahead of San Antonio, 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 Antonio, TX 21:34 9:34 PM Buenos Aires 23:34 11:34 PM You –:–
21:34 9:34 PM
Central Daylight Time · UTC-5
☀️ 07:32 · 🌙 19:11
23:34 11:34 PM
Argentina Standard Time · UTC-3
☀️ 06:20 · 🌙 19:03
·
+2 h
Buenos Aires is 2 h ahead of San Antonio, TX.
When you, San Antonio, 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 Antonio, 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
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇺🇸 San Antonio, TX | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 21:34 | 23:34 |
| Local date | Friday, October 9, 2026 | Friday, October 9, 2026 |
| Time zone | Central Daylight Time | Argentina Standard Time |
| UTC offset | UTC-5 | UTC-3 |
| Offset from San Antonio, 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 | 07:32 | 06:20 |
| Sunset | 19:11 | 19:03 |
| Daylight | 11 h 39 min | 12 h 43 min |
| People on this clock | 1,434,625 | 2,891,082 |
Compare San Antonio, TX with another city
More comparisons with San Antonio, TX: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
San Antonio, TX and Buenos Aires: common questions
How far ahead of San Antonio, TX, is Buenos Aires?
Buenos Aires is 2 hours ahead of San Antonio: UTC−3 against UTC−5.
If it is 9:00 AM in San Antonio, TX, what time is it in Buenos Aires?
At 9:00 AM in San Antonio, clocks in Buenos Aires show 11:00 AM.
If it is 6:00 PM in San Antonio, TX, what time is it in Buenos Aires?
At 6:00 PM in San Antonio, clocks in Buenos Aires show 8:00 PM.
When is a good time to call Buenos Aires from San Antonio, TX?
Between 9:00 AM and 4:00 PM in San Antonio – that is 11:00 AM to 6:00 PM in Buenos Aires – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Buenos Aires compared with San Antonio, TX?
The new day starts in Buenos Aires earlier: at 10:00 PM in San Antonio it is already midnight there. Until 2:00 AM in Buenos Aires, San Antonio is still on the previous day.
Is the time difference between San Antonio, TX, and Buenos Aires the same all year?
No. Only San Antonio switches to summer time, so the gap changes twice a year. From November 1, 2026, Buenos Aires will be 3 hours ahead of San Antonio.
