State of Hawaii Department of Education Official School Calendar: 
http://doe.k12.hi.us/calendars0809/calendar0809_boeapproved.pdf 

Individual School Calendars:  
http://165.248.6.166/data/calendars0809.asp

State of Hawaii Department of Education Official School Calendar:
http://www.doe.k12.hi.us/calendars0910/index.htm