Buenos Aires to San Francisco: time difference
San Francisco is 3 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 08:33 8:33 AM San Francisco 05:33 5:33 AM You –:–
08:33 8:33 AM
Argentina Standard Time · UTC-3
☀️ 06:07 · 🌙 19:11
05:33 5:33 AM
Central Standard Time · UTC-6
☀️ 05:26 · 🌙 17:18
·
−3 h
San Francisco is 3 h behind Buenos Aires.
When you, Buenos Aires and San Francisco 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 Francisco
21 9 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇦🇷 Buenos Aires | 🇨🇷 San Francisco |
|---|---|---|
| Local time | 08:33 | 05:33 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | Argentina Standard Time | Central Standard Time |
| UTC offset | UTC-3 | UTC-6 |
| Offset from Buenos Aires | — | −3 h |
| IANA zone | America/Argentina/Buenos Aires | America/Costa Rica |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:07 | 05:26 |
| Sunset | 19:11 | 17:18 |
| Daylight | 13 h 4 min | 11 h 53 min |
| People on this clock | 2,891,082 | 55,923 |
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 Francisco: common questions
What is the time difference between Buenos Aires and San Francisco?
San Francisco is 3 hours behind: it uses UTC−6, while Buenos Aires is on UTC−3.
If it is 9:00 AM in Buenos Aires, what time is it in San Francisco?
At 9:00 AM in Buenos Aires, clocks in San Francisco show 6:00 AM.
If it is 6:00 PM in Buenos Aires, what time is it in San Francisco?
At 6:00 PM in Buenos Aires, clocks in San Francisco show 3:00 PM.
When is a good time to call San Francisco from Buenos Aires?
Between 12:00 PM and 6:00 PM in Buenos Aires – that is 9:00 AM to 3:00 PM in San Francisco – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in San Francisco compared with Buenos Aires?
The new day starts in San Francisco later: until 3:00 AM in Buenos Aires, it is still the previous day there. From 9:00 PM in San Francisco, Buenos Aires is already on the next day.
Is the time difference between Buenos Aires and San Francisco the same all year?
Yes. Neither Buenos Aires nor San Francisco switches to summer time, so the gap is always 3 hours.
