Time in Sunnyvale, California, United States

Time zone: PDT (UTC/GMT -07:00) — America/Los_Angeles

The local standard in Sunnyvale is PDT — UTC-07:00, or 7 hours behind UTC. Systems that store time zones by name use America/Los_Angeles for this part of the world.

One date to watch: Sunday, 01 November 2026. That is when Sunnyvale goes back 1 hour onto PST — recurring meetings set before then will land an hour out unless the calendar handles zones properly.

Bear in mind United States spans 10 zones across the 419 cities we cover — checking a second city in the same country is often necessary.

Current gap between Sunnyvale and cities people most often need to coordinate with. These figures already account for daylight saving where it applies.

Where the two working days actually meet, expressed in Sunnyvale local time.

No shared working window exists with London, Paris, Dubai or Mumbai, so those calls have to sit outside somebody's normal hours.

These United States cities also use America/Los_Angeles, so their clocks read identically to Sunnyvale at every moment of the year.

Los Angeles San Jose San Francisco San Francisco Seattle Las Vegas Sacramento Bakersfield