San Francisco is typically 16 hours behind Hong Kong. When it's 11:00 PM in Hong Kong, it's 7:00 AM in San Francisco. Hong Kong does not observe daylight saving time, but San Francisco does.
During US daylight saving time (March to November), the difference is 15 hours. During US standard time (November to March), the difference increases to 16 hours.
Optimal meeting window: 5:00 AM - 7:00 AM San Francisco time (8:00 PM - 10:00 PM Hong Kong, or 9:00 PM - 11:00 PM in winter). Very early morning SF catches evening Hong Kong.
San Francisco's venture capital and tech sectors maintain strong investment ties with Hong Kong's financial markets.