Ark. R. Crim. P. 1.4
Where these rules, any statute governing procedure in criminal proceedings, or any court order entered in a criminal proceeding prescribes that a period of time of more than twenty-four (24) hours may or must intervene between events or acts, the day on which one (1) only of the events or acts occurs shall be computed as part of the designated period. When the first or last day of a time period is a Saturday, Sunday, or state or federal legal holiday, it shall not be computed as part of the period, which shall run until the end of the next day which is neither a Saturday, Sunday, nor a legal holiday. Whenever a party has the right or is required to take some action within a prescribed period after service of a notice or other paper and such service is allowed and made by mail, five (5) days shall be added to the prescribed period.
Ark. R. Crim. P. 1.4