Time Difference Between California and Las Vegas: None—They Share a Time Zone

There is no time difference between California and Las Vegas. Both are in the Pacific Time Zone (PT).

Details

• Standard Time (Nov–Mar): UTC−8 (PST)
• Daylight Saving Time (Mar–Nov): UTC−7 (PDT)
• Transition Dates: Identical (2nd Sunday March, 1st Sunday November).

Why the Confusion?

• Las Vegas is in Nevada, which borders Mountain Time states (Utah, Arizona*).
• Arizona (except Navajo Nation) does not observe DST—so in summer, Las Vegas matches Arizona (both UTC−7), but in winter, Las Vegas is 1 hour behind Arizona (UTC−8 vs UTC−7).
• California and Nevada coordinate DST changes.

So whether it's January or July, the clock reads the same in Los Angeles, San Francisco, Las Vegas, and Reno.