All dates are computed in accordance with the law.  Generally, all dates are calendar days (not work days), and they are computed by excluding the first day and including the last, unless the last day is a weekend or holiday.  If the last day is a weekend or holiday, then it is generally also excluded.  See HRS 291E-46.

For example, if a person was arrested and issued a NOAR for OVUII (alcohol) on 1 January 2016, the ADLRO is generally required to issue a review decision within 8 calendar days; however, in this case, day 8 fell on Saturday, 9 January 2016.  Therefore, the end date is extended until the next working day, which is Monday, 11 January 2016.  The ADLRO review decision must be mailed out by close of business on 11 January 2016.