They must mail the dues statement right before Christmas. Our last two have arrived on December 26th!
One thing about the due dates: if you have a reservation starting prior to Feb. 15, 2004, you will need to have paid in full (if you pay annually) or arranged for automatic monthly payment (if you pay monthly) prior to check-in. Dues must be current at the start of a reservation. We go to WDW and VB for a week right after New Year's each year. When we paid our dues in a single lump sum (I used to charge it to a credit card to get the "points"), I would call right when the statement arrived so we would have no problem at check-in. Now we just do a monthly auto debit from a bank account, so I don't worry about this.
Ralph