In computing any period of time prescribed or allowed in This Article, the day from which the designated period begins to run shall not be included. The last day of the period so computed shall be included unless it is a Saturday, Sunday, or legal holiday. When the period of time prescribed or allowed is less than seven days, intermediate Saturdays, Sundays, and legal holidays shall be excluded in the computation.
Ariz. Admin. Code § R20-5-804