023-2 Wyo. Code R. § 2-12
(a) In computing any period of time prescribed or allowed by these Rules, by order or by any applicable statutes or regulations, the day of the act, event or default from which the designated period of time begins to run shall not be included. The last day of the period so computed shall be included, unless it is a Saturday, a Sunday or a legal holiday, or, when the act to be done is the filing of a paper, a day on which weather or other conditions have made agency offices inaccessible, in which event the period runs until the end of the following day which is not one of the aforementioned days. When the period of time prescribed or allowed is less than 11 days, intermediate Saturdays, Sundays and legal holidays shall be excluded in the computation. As used in this Rule, "legal holiday" includes any day officially recognized as a legal holiday in this state by designation of the legislature or appointment as a holiday by the governor.
(b) Whenever a party has the right or is required to do some act within a prescribed period after the service of a notice or other paper upon the party, and the notice or paper is served upon the party by mail or by delivery to the agency for service, three days shall be added to the prescribed period.
023-2 Wyo. Code R. § 2-12
Adopted, Eff. 3/21/2016.