Hanoi ↔ San Francisco
Best Time to Call
Decent overlap available between 8:00 and 10:00 (Hanoi time).
Sync Hanoi and San Francisco easily. Hanoi is 15 hours ahead of San Francisco. Decent overlap available between 8:00 and 10:00 (Hanoi 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
15:43 GMT+9
Working
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New York City
01:43 EST
Sleeping
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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.
Hanoi Business Pulse
- Culture Formal, hierarchical, and relationship-driven. Government presence is strong.
- Lunch Break 12:00 PM - 1:30 PM.
- Pro Tip Best reached between 9:00 AM and 11:30 AM. Business in the capital is more formal and hierarchical than in the south. Relationships with authority and government are often important. Trust must be built through multiple polite interactions and formal introductions.
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 | Hanoi | San Francisco |
|---|---|---|
| Timezone | Asia/Bangkok | America/Los_Angeles |
| Country | Vietnam | USA |
| Coordinates | 21.03, 105.85 | 37.77, -122.42 |
| Population | 5,200,000 | 3,318,000 |