Wyo. Stat. § 8-4-114: Public lands day.

(a) In tribute to the importance of public lands in the state, to acknowledge the multiple use of public lands and in recognition of the value of public lands to the state's economy, open spaces, diversity of mineral, grazing and forestry resources, wildlife and recreational opportunities, the fourth Saturday in September of each year is designated as "public lands day" and appropriate observance may be held by the public and in all public schools of the state.

(b) Not later than September 1 of each year, the governor is authorized to issue a proclamation requesting the proper observance of "Public Lands Day."

(c) This section shall not affect commercial paper, the making or execution of written agreements or judicial proceedings, or authorize public schools, business or state and local government offices to close.

(d) As used in this section, "public lands" means all federal and state public lands. "Public lands" shall not include state trust lands managed for the benefit of Wyoming's public schools and institutions.