Any Discounts For Resorts During Mid-december?

[kandb]

We are going to disney in mid-September for the first time as a family (dh and almost 3 year old twins). We haven't been on vacation in 4 years so I am already planning vacation #2, which I was originally thinking end of January but now am considering mid-December. Are the resorts discounted at either time due to the slowness of the resorts? Thanks for any info, Linda