Houston is typically 14 hours behind Singapore. When it's 10:00 PM in Singapore, it's 8:00 AM the same day in Houston. Singapore does not observe daylight saving time, but Houston does.
During US daylight saving time (March to November), the difference is 13 hours. During US standard time (November to March), the difference increases to 14 hours.
Optimal meeting window: 6:00 AM - 8:00 AM Houston time (7:00 PM - 9:00 PM Singapore, or 8:00 PM - 10:00 PM in winter). Early morning Houston catches evening Singapore.
Houston is the energy capital of the US, while Singapore is a major Asian oil trading hub. Many oil and gas companies coordinate operations between these two cities.