Wyo. Stat. § 8-4-107: Juneteenth holiday.

(a) In celebration of the end of slavery in the United States proclaimed by Major General Gordon Granger on June 19, 1865 more than two and one-half (2½) years after the Emancipation Proclamation was issued by President Abraham Lincoln, and in recognition of those who died and sacrificed to achieve the end of slavery, the Juneteenth holiday is established.

(b) The Juneteenth holiday shall be celebrated each year with appropriate activities on the third Saturday of June.

(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.