San Francisco ↔ Seoul
Best Time to Call
Excellent overlap! The best window to call is between 16:00 and 17:00 (San Francisco time).
Sync San Francisco and Seoul easily. San Francisco is 17 hours behind Seoul. Excellent overlap! The best window to call is between 16:00 and 17:00 (San Francisco time).
Upcoming Time Change
- New York City clocks forward 1h in 11 days Mar 09
💡 Review recurring meetings scheduled during these dates to avoid sync issues.
Meeting Optimizer
Sync Score
3.3/10
-12h Current Time +12h
🌍
Tokyo
15:43 GMT+9
Working
🌍
New York City
01:43 EST
Sleeping
🌍
London
06:43 GMT
Sleeping
Synchronization Context
Operating on opposite sides of the clock, these cities have virtually no overlapping business hours. Expect a 24-hour turnaround for most communications.
San Francisco Business Pulse
- Culture Innovation-focused and casual. Values disruption, speed, and technical excellence.
- Lunch Break 12:30 PM - 1:30 PM.
- Pro Tip Best reached between 10:00 AM and 4:00 PM. Expect a casual, tech-first vibe—informal language and dress are the norm. However, technical competence and speed are non-negotiable. Many in the Bay Area work non-traditional hours, but standard business times remain the safest bet.
Seoul Business Pulse
- Culture Extremely hardworking and hierarchical. "Pali-pali" (hurry-hurry) culture drives rapid growth.
- Lunch Break 12:00 PM - 1:00 PM.
- Pro Tip The ideal window is 9:30 AM to 11:30 AM. South Koreans value speed ("Pali-pali") and expect rapid responses. Avoid the 12-1 PM lunch hour strictly. Ensure you follow hierarchical protocols if senior leaders are present, and never arrive (digitally or in-person) late for a call.
Quick Comparison
| Feature | San Francisco | Seoul |
|---|---|---|
| Timezone | America/Los_Angeles | Asia/Seoul |
| Country | USA | South Korea |
| Coordinates | 37.77, -122.42 | 37.57, 126.98 |
| Population | 3,318,000 | 9,988,000 |