1. On May 23, 1934, Hawaii's first radio station, KONA, went on the air. The station was owned by a consortium of investors and was initially located in downtown Honolulu.

2. May 23, 1902, marked the opening of Hawaii's first electric plant, which was built by Hawaiian Electric Company. The plant was located on Bishop Street in Honolulu and provided power for streetlights and a few businesses.

3. In 1969, Hawaii's Legislature passed a resolution officially recognizing May 23 as Lei Day. The day is now celebrated throughout the state as a way to honor Hawaii's tradition of lei-making and the importance of the lei in Hawaiian culture.

4. May 23, 1972, marked the opening of the Diamond Head State Monument in Honolulu. The monument includes a hiking trail that leads up to the top of Diamond Head, a volcanic crater that offers stunning views of Honolulu and the surrounding area.

5. On May 23, 2002, Hawaii became the first state in the United States to ban smoking in all enclosed public spaces, including bars and restaurants. The law was considered groundbreaking at the time and has since been adopted by many other states and countries.