Las Vegas vs London Time Difference

Why the 8-Hour Gap From Las Vegas to London Never Moves

Las Vegas sits 8 hours behind London, every single day of the year. When it is 8:00 AM in Las Vegas, it is 4:00 PM in London. When it is 10:00 PM in London, it is 2:00 PM in Las Vegas. No seasonal shift, no twice-a-year confusion.

This is a rare case where the time difference linking two major cities that both observe daylight saving time stays perfectly flat.

Does the Las Vegas vs London Time Difference Change When the UK Moves to BST?

No. The UK and the US both change their clocks for daylight saving time. The UK moves from Greenwich Mean Time (GMT, UTC+0) in winter to British Summer Time (BST, GMT+1) in summer. Las Vegas moves from Pacific Standard Time (PST, UTC-8) in winter to Pacific Daylight Time (PDT, UTC-7) in summer.

Both places spring forward in March and fall back in November. The dates are not identical, but the overlap is long enough that for practical purposes the 8-hour gap never breaks. When the UK is on BST, Las Vegas is on PDT, and the offset is 8 hours. When the UK is on GMT, Las Vegas is on PST, and the offset is still 8 hours.

When Does the UK Clock Change Affect the Las Vegas vs London Time Difference?

The UK's clock changes are the ones to watch, because they set the reference.

• Winter (GMT, UTC+0): London is at UTC+0. Las Vegas is at UTC-8. Difference: 8 hours.
• Summer (BST, GMT+1): London moves to UTC+1. Las Vegas moves to UTC-7. Difference: still 8 hours.

Las Vegas daylight saving time starts the second Sunday of March and ends the first Sunday of November. The UK changes on the last Sunday of March and the last Sunday of October. For a few weeks in March and a few days in October, the UK and Las Vegas are not on the same "season" of DST. But because both shifts are one hour, the offset linking them stays at 8 hours even during those transition weeks.

What Is the Best Time to Call Between Las Vegas and London?

The 8-hour gap means the overlap connecting a standard 9 to 5 workday in both cities is tight.

• Las Vegas morning, London afternoon: 8:00 AM Las Vegas is 4:00 PM London. That is the best window. Book a call at 8:00 AM Pacific to catch the end of the London workday.
• London morning, Las Vegas late night: 9:00 AM London is 1:00 AM Las Vegas. Skip it.
• Las Vegas late afternoon, London late night: 4:00 PM Las Vegas is midnight London. Also a miss.

The golden hour for a two-way conversation is 8:00 AM to 10:00 AM Pacific, which is 4:00 PM to 6:00 PM London. If you are in London and need to reach someone in Las Vegas, call between 4:00 PM and 6:00 PM London time. For more specific scheduling, see the best time to call Las Vegas guide.

Las Vegas to London Time Conversion Table

Use this table year-round. It does not change when the clocks do.