It’s actually “Kill a Haole Day” observed on the last day of school.
Random violence against whites is officially sanctioned since Hawaii has a race law elevating “purebred” Hawaiians above other groups in terms of property and government hiring. Historically, pure Hawaiians were mostly bred out of existence by race mixing well before WWII.
I learned all this from a Hawaiian first sergeant I knew. He had a copy of “Pidgin To Da Max” in his office. Dah bruddahs like to pick fights & the last thing a haole hears before his lights get punched out is, “Want beef?”