735 ILCS 5/11-106
When an application is made on a Saturday, Sunday, legal holiday or on a day when courts are not in session for injunctive relief and there is filed with the complaint an affidavit of the plaintiff, or his, her or their agent or attorney, stating that the benefits of injunctive relief will be lost or endangered, or irremediable damage occasioned unless such injunctive relief is immediately granted, and stating the bases for such alleged consequence, and if it appears to the court from such affidavit that the benefits of injunctive relief will be lost or endangered, or irremediable damage occasioned unless such injunctive relief is immediately granted, and if the plaintiff otherwise is entitled to such relief under the law, the court may grant injunctive relief on a Saturday, Sunday, legal holiday, or on a day when courts are not in session; and it shall be lawful for the clerk to certify, and for the sheriff or coroner to serve such order for injunctive relief on a Saturday, Sunday, legal holiday or on a day when courts are not in session as on any other day, and all affidavits and bonds made and proceedings had in such case shall have the same force and effect as if made or had on any other day.
735 ILCS 5/11-106