You learn something new everyday.
Although I am familiar with Hawaiian history, I did not know today was a holiday.

Prince Jonah Kuhio Kalanianaole was born on March 26, 1871 in Koloa, Kauai, and was in line to become king before the monarchy was overthrown in 1893. He went on to represent Hawaii in Washington, and was credited with paving the way for significant local growth, from the dredging of Pearl Harbor to establishing the Hawaii Volcanoes National Park. Kuhio is best remembered for his successful effort to get Congress to pass the 1920 Hawaiian Homes Commission Act, which provides homesteads for native Hawaiians. It was his dream to save the rapidly declining Hawaiian race from extinction. His plan was to return tenement dwellers to the land and encourage them to be self-sufficient farmers, ranchers and homesteaders on leased parcels of reserved land.

The territorial legislature designated his birthday a holiday in 1949. Unfortunately, the "day off" is often offset by Spring Break, which usually coincides with it.