Hong Kong is 15-16 hours ahead of Las Vegas. Las Vegas uses Pacific Time (PST/PDT) while Hong Kong uses Hong Kong Time (HKT, UTC+8). When it's 9:00 AM in Las Vegas, it's 12:00 AM (PST) or 1:00 AM (PDT) the next day in Hong Kong.
Hong Kong does not observe daylight saving time, but the US does. The difference is 15 hours during US daylight saving time (March-November) and 16 hours during standard time.
Best calling time: 5:00 PM - 1:00 AM Las Vegas time. This corresponds to 9:00 AM - 5:00 PM in Hong Kong, covering Hong Kong business hours.
Las Vegas and Hong Kong are both known for their casinos and entertainment industries. Las Vegas attracts many Asian tourists, and there are direct flights connecting the two cities.