A.R.S. § 43-241: Time for performance of acts; definition

A. Notwithstanding any other provision of this title or title 1, if the last day for performing any act under this title falls on a Saturday, Sunday or legal holiday, the act is considered timely if it is performed on the next day that is not a Saturday, Sunday or legal holiday.

B. For the purposes of this section "legal holiday" shall include holidays specified in section 1-301 and holidays determined by the United States secretary of the treasury for the purposes of section 7503 of the internal revenue code.