In California, jury duty follows a "one day or one trial" system. This means:

• If you are not selected to serve on a jury, your service is typically completed after one day at the courthouse

• If you are selected to serve on a trial, you must serve for the entire length of that trial, which usually lasts between 3 to 7 days but can sometimes be longer depending on the complexity of the case

• Most trials are completed within a week, though some may last one to two weeks

• After completing jury service, you are generally exempt from being called again for at least one year

Additionally, in federal courts in Northern California, jurors are on call for up to two weeks (10 consecutive court days) for jury selection or trial service, but you only serve one trial or one day of selection

. In summary, your jury duty in California will last either one day if you are not selected or for the duration of the trial if you are selected, typically ranging from a few days up to one or two weeks. After serving, you are usually exempt from jury duty for at least a year.