You can try, but I really doubt you will be successful. I have not heard of anyone who was able to change their use year after the sale closed.
The use year is part of your contract. To get a different use year, you would have to sell your current contract and purchase a new one. In most cases, you will lose quite a bit of $$ to do this.
Onky you can decide if the possibility of cancelling a vacasiton scheduled later in your use year is worth the cost to get a different use year.