Colombo ↔ San Francisco
Best Time to Call
Decent overlap available between 8:00 and 9:00 (Colombo time).
Sync Colombo and San Francisco easily. Colombo is 13 hours 30 minutes ahead of San Francisco. Decent overlap available between 8:00 and 9:00 (Colombo time).
Upcoming Time Change
- New York City clocks forward 1h in 10 days Mar 08
💡 Review recurring meetings scheduled during these dates to avoid sync issues.
Meeting Optimizer
Sync Score
5.3/10
-12h Current Time +12h
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Tokyo
17:07 GMT+9
Personal
Outside Business Hours🌍
New York City
03:07 EST
Sleeping
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London
08:07 GMT
Personal
Outside Business HoursSynchronization Context
Operating on opposite sides of the clock, these cities have virtually no overlapping business hours. Expect a 24-hour turnaround for most communications.
Colombo Business Pulse
- Culture Professional and hierarchical. Values personal rapport and education.
- Lunch Break 1:00 PM - 2:00 PM.
- Pro Tip Best call window is 10:00 AM to 12:00 PM. Sri Lankans value education and professional titles. Business culture is relational; spend time on polite introductions. Punctuality is appreciated. Be aware of potential power disruptions and have a backup communication plan like WhatsApp.
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 | Colombo | San Francisco |
|---|---|---|
| Timezone | Asia/Colombo | America/Los_Angeles |
| Country | Sri Lanka | USA |
| Coordinates | 6.93, 79.86 | 37.77, -122.42 |
| Population | 753,000 | 3,318,000 |