1. In 1893, the Committee of Safety, a group of American and European businessmen, overthrew the Hawaiian monarchy and established a provisional government with Sanford B. Dole as president.

2. On April 11, 1961, the Polynesian Voyaging Society was founded by Herb Kawainui Kane, a Hawaiian artist and historian, and a group of traditional Hawaiian canoe builders and navigators. The society's mission is to perpetuate the art of traditional Polynesian voyaging and to promote cultural exchange and understanding.

3. In 1972, the United States Congress passed the American Indian Religious Freedom Act (AIRFA), which protects the rights of Native Americans to practice their traditional religions, including those that involve the use of sacred objects and ceremonial practices. The act has had a significant impact on the Native Hawaiian community, who have been fighting for the right to practice their traditional religion and cultural practices.

4. On April 11, 1986, the Chernobyl nuclear disaster occurred in Ukraine, which had a far-reaching impact on the environment and public health around the world, including in Hawaii. The disaster led to increased awareness of the dangers of nuclear energy and spurred the development of renewable energy sources.

5. In 2008, Hawaii became the first state in the United States to ban single-use plastic bags, in an effort to reduce litter and protect marine life. The ban went into effect on July 1, 2015, and has since been followed by other states and countries around the world.