§231-21 Due date on Saturday, Sunday, or holiday. When the due date for any remittance or document required by any law imposing a tax falls on a Saturday, Sunday, or legal holiday, the remittance or document shall not be due until the next succeeding day which is not a Saturday, Sunday, or legal holiday. [L 1965, c 133, §1; Supp, §115-25.5; HRS §231-21]