Administrative Litigation Act Article 84

Unless otherwise provided, the date for a court session shall be designated at the presiding judge's discretion.Except under compelling circumstances, a court session may not be designated on Sunday or any other holiday.
中文原文 行政訴訟法第84條
期日,除別有規定外,由審判長依職權定之。
期日,除有不得已之情形外,不得於星期日或其他休息日定之。

English translation for reference only; the Chinese text prevails. Not legal advice.