Jury service lasts for one day or the length of one trial. On the first day of jury service, be prepared to remain at the courthouse the entire day.To request a postponement, follow the instructions in the Juror Affidavit Questionnaire or Summons or contact the court in which you are scheduled to appear. Information for Jurors. Potential jurors must complete the juror qualification questionnaire. Plaintiff's Demand for Jury Trial, CVC11F. In its demand, a party must specify the issues for which it requests a jury. Select the date and judge that is on your summons to see if the trial is still scheduled. Correspond with the categories in the demand. 2. 12-1176. Demand for jury; trial procedure.