The judge of the probate court may transact business at any time except Sundays and may close his office not more than one other day in each week. Where authorized or not prohibited by law, any hearing or other proceeding may be had and any order or judgment may be rendered at any time. However, nothing in this Code section shall be construed as prohibiting the judge of the probate court from providing by calendar for the orderly and uniform transaction of business on designated days.