Incheon ↔ San Francisco
Best Time to Call
Excellent overlap! The best window to call is between 9:00 and 10:00 (Incheon time).
Sync Incheon and San Francisco easily. Incheon is 17 hours ahead of San Francisco. Excellent overlap! The best window to call is between 9:00 and 10:00 (Incheon 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
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Tokyo
15:42 GMT+9
Working
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New York City
01:42 EST
Sleeping
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London
06:42 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.
Incheon Business Pulse
- Culture Global-looking, logistics-heavy, and closely linked to Seoul. Values speed and connectivity.
- Lunch Break 12:00 PM - 1:00 PM.
- Pro Tip Ideal window is 9:30 AM to 11:30 AM. As a major logistics and aviation hub, business is fast-paced and international. Punctuality and rapid response times ("Pali-pali") are expected. Follow formal hierarchical protocols strictly in all professional 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.
Quick Comparison
| Feature | Incheon | San Francisco |
|---|---|---|
| Timezone | Asia/Seoul | America/Los_Angeles |
| Country | South Korea | USA |
| Coordinates | 37.46, 126.71 | 37.77, -122.42 |
| Population | 2,942,000 | 3,318,000 |