San Francisco to Buenos Aires: time difference
Buenos Aires is 3 h ahead of San Francisco. Live clocks for both, the working hours they share, and how each one sits against your own time.
+3 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
San Francisco 04:46 4:46 AM Buenos Aires 07:46 7:46 AM You –:–
04:46 4:46 AM
Central Standard Time · UTC-6
☀️ 05:26 · 🌙 17:18
07:46 7:46 AM
Argentina Standard Time · UTC-3
☀️ 06:07 · 🌙 19:11
·
+3 h
Buenos Aires is 3 h ahead of San Francisco.
When you, San Francisco 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 Francisco
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
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 2 2 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇨🇷 San Francisco | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 04:46 | 07:46 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | Central Standard Time | Argentina Standard Time |
| UTC offset | UTC-6 | UTC-3 |
| Offset from San Francisco | — | +3 h |
| IANA zone | America/Costa Rica | America/Argentina/Buenos Aires |
| Daylight saving | Not observed | Not observed |
| Sunrise | 05:26 | 06:07 |
| Sunset | 17:18 | 19:11 |
| Daylight | 11 h 53 min | 13 h 4 min |
| People on this clock | 55,923 | 2,891,082 |
Compare San Francisco with another city
More comparisons with San Francisco: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
San Francisco and Buenos Aires: common questions
How many hours ahead of San Francisco is Buenos Aires?
The clocks in Buenos Aires are 3 hours ahead of those in San Francisco (UTC−3 and UTC−6).
What time is it in Buenos Aires when it is 9:00 AM in San Francisco?
When it is 9:00 AM in San Francisco, it is 12:00 PM in Buenos Aires.
What time is it in Buenos Aires when it is 6:00 PM in San Francisco?
When it is 6:00 PM in San Francisco, it is 9:00 PM in Buenos Aires.
When is a good time to call Buenos Aires from San Francisco?
Between 9:00 AM and 3:00 PM in San Francisco – that is 12:00 PM to 6:00 PM in Buenos Aires – both places are within working hours (9:00 AM–6:00 PM).
From what time in San Francisco is it tomorrow in Buenos Aires?
Once it is 9:00 PM in San Francisco, the date in Buenos Aires has already changed. Until 3:00 AM in Buenos Aires, it is still the previous day in San Francisco.
Does the time gap between San Francisco and Buenos Aires change during the year?
No, the clocks change neither in San Francisco nor in Buenos Aires, so the gap is 3 hours all year round.
