1. Idaho's First Public School Opened on May 23, 1864: The first public school in Idaho, located in Lewiston, opened its doors to students on May 23, 1864, with a total of 23 students enrolled. The school was established by the Idaho Territorial Legislature in 1863 to provide free education to children of all races.

2. Idaho's First Woman Mayor Was Elected on May 23, 1919: Susie A. Benger, a prominent suffragist and community leader, was elected as the first woman mayor in Idaho on May 23, 1919. She served as mayor of St. Anthony for one term, from 1919 to 1921, and was known for her progressive leadership and advocacy for women's rights.

3. The First Transcontinental Air Mail Flight Stopped in Idaho on May 23, 1920: On May 23, 1920, the first transcontinental air mail flight made its first stop in Idaho, at the Boise Airfield. The flight, which originated in New York City, marked a major milestone in the development of air mail service in the United States.

4. The First Special Olympics Idaho Games Were Held on May 23, 1975: The first Special Olympics Idaho Games were held on May 23, 1975, in Boise, with over 300 athletes from across the state participating. The games were organized by a group of parents, educators, and health professionals who wanted to provide opportunities for athletes with intellectual disabilities to compete and showcase their talents.

5. Idaho's First Native-Born Governor Took Office on May 23, 1977: John Victor Evans, a Republican from Malad City, became the first native-born governor of Idaho on May 23, 1977. Evans served as governor for two terms, from 1977 to 1987, and was known for his conservative policies and commitment to education reform.