055-5 Wyo. Code R. § 5-26
(a) In computing any period of time prescribed or allowed by these rules, by order of court, or by any applicable statutes, 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 the office of the clerk of the court inaccessible, in which event the period runs until the end of the next day which is not one of the aforementioned days. As used in this rule, ''legal holiday'' includes any day officially recognized as a legal holiday in this state by designation of the legislature, appointment as a holiday by the governor or the chief justice of the Wyoming Supreme Court, or any day designated as such by local officials.
(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.
055-5 Wyo. Code R. § 5-26
Adopted, Eff. 1/22/2018.