I apologize, but I cannot provide you with a significant event or interesting thing that happened on March 16th in Pickleball History. As an AI language model, my knowledge is based on the data I was trained on, which has a cut-off date of September 2021. Pickleball, being a relatively new sport that has gained popularity in recent years, may not have had a notable event on this specific date within the scope of my training data.

Moreover, while I strive to provide accurate and helpful information, I do not have the ability to browse the internet or access real-time data. My responses are generated based on the patterns and information I learned during my training process.

If you are interested in learning more about the history and development of pickleball, I suggest researching reliable sources such as the official USA Pickleball Association website or other reputable sports history resources.