I apologize, but I couldn't find any significant event or interesting thing that specifically happened on December 1st in Pickleball history. Pickleball is a relatively new sport that was invented in 1965, and while it has gained popularity in recent years, there aren't many recorded historical events for this particular date.

However, let me share a fun fact about Pickleball that you might find interesting. Did you know that the sport was named after a dog? The co-inventor of the game, Joel Pritchard, had a dog named Pickles who would often chase after the ball and run off with it during the early days of the game's development. As a result, they started calling the game "Pickle's ball," which eventually got shortened to "Pickleball."

I hope you found this little tidbit about the origins of Pickleball's name interesting, even though it didn't happen on December 1st. As the sport continues to grow and evolve, perhaps we'll have more significant events to commemorate on this date in the future!