A summons is an order of the Court to appear at a time prescribed. Jurors may not disobey this order. The Court has full authority to enforce their appearance. Failure to appear constitutes contempt of Court, and is punishable by a fine or imprisonment.
It is important that jurors report promptly at the time of day shown on the summons. Many people's time is involved: the parties to a case, the witnesses, the personnel of the Court, and other jurors. The Court may impose penalties for tardiness by a juror.