Haw. Code R. § 18-231-91-12
In computing any time period under these rules, the day of the act, event, or default from which the 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, Sunday, state holiday, or state government furlough day. Intermediate Saturdays, Sundays, legal holidays, or government furlough days shall be included. Intermediate Saturdays, Sundays, state holidays, or state government furlough days shall be excluded in the computation when the period of time prescribed or allowed is less than seven days. Whenever an act required to be performed under these rules may be accomplished by mail, the act shall be deemed to have been performed on the date the items are actually received by the recipient.
Haw. Code R. § 18-231-91-12