Las Vegas is typically 16 hours behind Singapore. When it's midnight in Singapore, it's 8:00 AM the previous day in Las Vegas. Singapore does not observe daylight saving time, but Las Vegas 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: 4:00 AM - 6:00 AM Las Vegas time (7:00 PM - 9:00 PM Singapore, or 8:00 PM - 10:00 PM in winter). Very early morning Las Vegas catches evening Singapore.
Both Las Vegas and Singapore are entertainment destinations with world-class casinos. Singapore's Marina Bay Sands was inspired by Las Vegas casino resort design.