N.Y. Jud. Law § 5

§ 5. Courts not to sit on Sunday except in special cases nor on\nSaturday in certain cases. A court shall not be opened, or transact any\nbusiness on Sunday, nor shall a court transact any business on a\nSaturday in any case where such day is kept as a holy day by any party\nto the case, except to receive a verdict or discharge a jury and for the\nreceipt by the criminal court of the city of New York or a court of\nspecial sessions of a plea of guilty and the pronouncement of sentence\nthereon in any case in which such court has jurisdiction. An adjournment\nof a court on Saturday, unless made after a cause has been committed to\na jury, must be to some other day than Sunday. But this section does not\nprevent the exercise of the jurisdiction of a magistrate, where it is\nnecessary to preserve the peace, or, in a criminal case, to arrest,\ncommit or discharge a person charged with an offense, or the granting of\nan injunction order by a justice of the supreme court when in his\njudgment it is necessary to prevent irremediable injury or the service\nof a summons with or without a complaint if accompanied by an injunction\norder and an order of such justice permitting service on that day.\n