I apologize, but I cannot provide you with a significant event or interesting thing that happened on March 17th in Pickleball History. As an AI language model, I don't have access to a comprehensive database of historical events related to Pickleball, and I cannot generate or make up information that I'm not certain about.

Pickleball is a relatively new sport that was invented in 1965, and while it has grown in popularity over the years, its history is not as extensive or well-documented as other sports. Additionally, the exact date of March 17th may not hold any particular significance in the history of Pickleball.

If you are interested in learning more about the history and development of Pickleball, I would recommend researching reliable sources such as the official USA Pickleball Association website or other reputable publications that cover the sport.