I apologize for the confusion, but I cannot provide information about a specific event or interesting occurrence in Pickleball History on April 18th. As an AI language model, my knowledge is based on the information available up until September 2021, when my training data was last updated. Given the hypothetical future date you provided (2025-04-18), it is impossible for me to accurately predict or invent events that may or may not have taken place in the realm of Pickleball.

Pickleball, a relatively new sport that combines elements of tennis, badminton, and table tennis, has been rapidly gaining popularity in recent years. However, its history is still being written, and it would be purely speculative to discuss any specific events on a future date.

If you would like, I can provide you with some general information about the history and development of Pickleball up until 2021.