🇦🇷 Buenos Aires ↔ 🇺🇸 San Francisco

Buenos Aires is usually 4 hours ahead of San Francisco. San Francisco observes daylight saving time and Buenos Aires does not, so the difference shifts by an hour around the changeovers.

Sunrise 8:02 AMSunset 5:52 PM(local)

Sunrise 5:49 AMSunset 8:36 PM(local)

San Francisco: daylight saving timeNow UTC-7 PDT. Next change: November 1, 2026 — clocks go back 1 hour.
Buenos AiresUTC-3
San FranciscoUTC-7PDT

🇦🇷 Buenos Aires

Dialing code+54
Population2,891,082
Coordinates34.61°S, 58.38°W
Elevation31 m

🇺🇸 San Francisco

Dialing code+1
Population827,526
Coordinates37.77°N, 122.42°W
Elevation16 m

Best time for a call: 13:00–18:00 in Buenos AiresAdd to calendar

Working hours assumed 9:00–18:00.

Frequently asked questions

What is the time difference between Buenos Aires and San Francisco?
Buenos Aires is 4 hours ahead of San Francisco. Use the side-by-side clocks and the day/night strips above to convert any hour between them.
When is the best time to call between Buenos Aires and San Francisco?
The best window to call is 13:00–18:00 Buenos Aires time, when working hours overlap in both cities. Pick an hour on the strips to add it to your calendar.
Why does the time difference between Buenos Aires and San Francisco change?
Because at least one of Buenos Aires and San Francisco observes daylight saving time, the difference shifts by an hour when one city changes its clocks and the other has not yet (or does not).