* A casino: There are several casinos called Silver Slipper, in different locations. To tell you when a specific one was created, I need to know which one you're asking about.
* A shoe: There are many different shoes called Silver Slipper. To tell you when a specific one was created, I need to know which brand and model you're asking about.
* A song: There are songs titled "Silver Slipper," but I need more information to know which one you're referring to.
* Something else? It's possible "Silver Slipper" refers to something else entirely.
Please provide more information so I can help you find the answer you're looking for. 😊