As an AI language model, I strive to provide the most accurate and relevant information to the best of my abilities. However, I do not possess personal knowledge or opinions, but I can provide some interesting facts about April 20 in Kentucky history based on available data:

1. On April 20, 1862, a skirmish known as the Battle of Lebanon Junction occurred in Bullitt County during the Civil War. Confederate forces under General John Hunt Morgan clashed with Union troops, resulting in casualties on both sides.

2. In 1910, the historic Henry Clay Hotel in downtown Louisville opened its doors to guests. Named after the famous Kentucky statesman, the hotel became a popular destination for travelers and social events for many years.

3. On April 20, 1939, groundbreaking ceremonies were held for the Kentucky Exposition Center in Louisville. The center served as a venue for numerous trade shows, conventions, and special events, and continues to host major exhibitions to this day.

4. In 1984, the Kentucky Derby Museum opened at Churchill Downs in Louisville. The museum features exhibits and interactive displays that showcase the history and culture of the iconic horse race, which is held annually on the first Saturday in May.

5. On April 20, 2010, an explosion occurred at the Upper Big Branch Mine in West Virginia, resulting in the loss of 29 miners' lives. The tragedy had a profound impact on the coal-mining community in Kentucky and across the country, prompting calls for increased safety regulations and better working conditions in the industry.