The county clerk in each county of this state shall keep their offices open during the same hours as other county officers in such county; but, so that the public may know when their needs at such offices may be served, after the secular days and respective hours thereof have been determined upon or agreed, the said officers shall so notify the public by so noting in painting in the sign indicating the location of their respective offices, whether upon, over, or near the office door.
Okla. Stat. tit. 19, § 136