Oh, Regina, you are going to have so much fun during your first trip there. The holidays are a truly wonderful time to spend in this magical place. You have chosen a great resort, too! My family loved staying there several years ago. I hope you are planning to dine at
'Ohana. Their Best Friends Breakfast with Lilo and Stitch is one of my kids' favorites and I would highly recommend it.
In answer to your question, at this time, no official dates have been announced for a Free Dining period for 2013. In the past, the dates have been in late summer/early fall. This is a promotion that is very popular, however, it can change from year to year. Even if it does return this year, it is unlikely that it would be available during the popular holiday season.
I hope you enjoy planning your first trip, and please feel free to stop back by and ask me any other questions as they come up in your planning process. I would love to help in any way I could.
~Allison L