1. On June 23, 1865, the Kentucky State Legislature ratified the 13th Amendment to the United States Constitution, which officially abolished slavery throughout the United States.

2. On June 23, 1937, the Kentucky River flooded, causing significant damage to cities and towns along its banks. The flood was one of the worst natural disasters in the state's history, and prompted the construction of several dams and reservoirs to control flooding in the future.

3. On June 23, 1969, the Kentucky Court of Appeals issued a ruling in the landmark case of Commonwealth v. Wasson, which upheld the right of citizens to protest against the Vietnam War. The case paved the way for future free speech and protest rights in the state.

4. On June 23, 1998, Kentucky Governor Paul Patton signed a law making it illegal to sell or distribute tobacco products to minors under the age of 18. The law was one of the first of its kind in the nation, and helped to reduce smoking rates among young people in the state.

5. On June 23, 2015, the United States Supreme Court ruled in favor of same-sex marriage in the landmark case of Obergefell v. Hodges. The ruling effectively legalized same-sex marriage nationwide, including in Kentucky.