1. On April 8, 1905, the first performance of the Hawaiian musical comedy "Robinson Crusoe, Jr." was held at the Hawaiian Opera House in Honolulu. The show, which featured music composed by Harold Orlob and lyrics by William Jerome, was a hit and went on to play in theaters across the United States.

2. Hawaii Governor George R. Carter signed a bill on April 8, 1907, establishing the Hawaii Agricultural Experiment Station. The station, which is now known as the College of Tropical Agriculture and Human Resources at the University of Hawaii at Manoa, conducts research and provides education in the areas of agriculture, natural resources, and human development.

3. The U.S. Navy commissioned the USS Oahu (PR-6) on April 8, 1931. The Oahu was a patrol gunboat that served in the Pacific during World War II and was eventually decommissioned and sold for scrap in 1946.

4. On April 8, 1947, the Hawaii Statehood Commission was established by an act of the U.S. Congress. The commission was tasked with promoting statehood for Hawaii and worked to build support for Hawaii's admission as the 50th state of the United States in 1959.

5. The Hawaii Ironman Triathlon, one of the world's most grueling endurance events, was first held on April 8, 1978. The competition consists of a 2.4-mile swim, a 112-mile bike ride, and a full marathon (26.2 miles) and takes place on the island of Hawaii. Today, the Ironman World Championship is held annually in Kailua-Kona and attracts athletes from around the world.