Any person doing business under a license issued in accordance with the provisions of this chapter shall close his place of business not later than twelve o'clock (12:00) midnight of each night during the year, and shall keep the same closed until six o'clock (6:00) A.M. the next day, and shall keep the same closed all day on the first day of the week, commonly called Sunday. (Ord. 11, 9-5-1921)