Hawaii Revised Statutes Division 1. Government § 46-41

Except as otherwise provided in this chapter, all counties shall maintain accounting and financial records on a fiscal year basis, beginning on July 1 or another day of a calendar year and ending on the appropriate day of the next succeeding calendar year. Counties may prepare a budget for a one- or two-year period; provided that accounting and financial records are maintained on a fiscal year basis as described above.