1. In 1877, the unsuccessful uprising by Royalist forces against the new government of King Kalākaua, known as the 1874 Revolution, came to a close with the arrest and imprisonment of the uprising's leaders. Many of the leaders were pardoned years later after public opinion had changed, and some went on to serve in high-ranking positions in the Kingdom of Hawaii.

2. June 9, 1923 marked the inauguration of Hawaii National Park, which at the time included the summits of Mauna Loa and Kilauea, as well as the surrounding rainforest. Today, the park is known as Hawaii Volcanoes National Park and has expanded to encompass additional areas of the Big Island.

3. In 1944, the United States Navy established the Naval Air Station Kahului on Maui, which served as an important training and logistics center during World War II. The base was later repurposed as the Kahului Airport, Maui's primary airport.

4. The 1960s saw significant growth in Hawaii's tourism industry, and June 9, 1967 marked the debut of the Polynesian Cultural Center on the North Shore of Oahu. The center is dedicated to preserving and sharing the cultures of Polynesia through performances, exhibits, and interactive experiences.

5. On June 9, 1983, the US Supreme Court upheld the constitutionality of the Hawaii state law that provided for mandatory public school attendance beginning at age 5 and continuing until age 18. The ruling affirmed the state's authority to require all children to attend public school or obtain equivalent education.