Port Costa, California is located in the Pacific Time Zone, which means that the time is Pacific Standard Time (PST) during regular time
and Pacific Daylight Time (PDT) when daylight savings is in effect.
Pacific Standard Time
When it is Pacific Standard Time, Port Costa, California is UTC-08:00 which means that it is -8 hours offset from
Coordinated Universal Time (UTC).
The Pacific Standard Time in Port Costa, California (UTC-08:00) is shown in blue below:
Pacific Daylight Time
When it is Pacific Daylight Time, Port Costa, California will be UTC-07:00 which means that it is -7 hours
offset from Coordinated Universal Time (UTC) and the time will be as follows in green:
As you can see, the difference between PST and PDT in Port Costa, California is one hour, because the daylight savings is
adjusted by one hour.
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