Istanbul is usually 10 hours ahead of San Francisco. San Francisco observes daylight saving time and Istanbul does not, so the difference shifts by an hour around the changeovers.

IstanbulSan Francisco

Sunrise 5:51 AMSunset 8:31 PM(local)

Sunrise 6:06 AMSunset 8:28 PM(local)

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

🇹🇷 Istanbul

Dialing code+90
Population15,701,602
Coordinates41.01°N, 28.95°E
Elevation39 m

🇺🇸 San Francisco

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

No comfortable common working hours — these cities barely overlap.

Working hours assumed 9:00–18:00.

Frequently asked questions

What is the time difference between Istanbul and San Francisco?
Istanbul is 10 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 Istanbul and San Francisco?
There is no hour when standard working hours (9:00–18:00) overlap in both Istanbul and San Francisco, so any call falls outside business hours for at least one side.
Why does the time difference between Istanbul and San Francisco change?
Because at least one of Istanbul 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).