Cal. Penal Code § 1191

In a felony case, after a plea, finding, or verdict of guilty, or after a finding or verdict against the defendant on a plea of a former conviction or acquittal, or once in jeopardy, the court shall appoint a time for pronouncing judgment, which shall be within 20 judicial days after the verdict, finding, or plea of guilty, during which time the court shall refer the case to the probation officer for a report if eligible for probation and pursuant to Section 1203. However, the court may extend the time not more than 10 days for the purpose of hearing or determining any motion for a new trial, or in arrest of judgment, and may further extend the time until the probation officer’s report is received and until any proceedings for granting or denying probation have been disposed of. If, in the opinion of the court, there is a reasonable ground for believing a defendant insane, the court may extend the time for pronouncing sentence until the question of insanity has been heard and determined, as provided in this code. If the court orders the defendant placed in a diagnostic facility pursuant to Section 1203.03, the time otherwise allowed by this section for pronouncing judgment is extended by a period equal to (1) the number of days which elapse between the date of the order and the date on which notice is received from the Director of Corrections advising whether or not the Department of Corrections will receive the defendant in the facility, and (2) if the director notifies the court that it will receive the defendant, the time which elapses until his or her return to the court from the facility.