If your "piece" of Kidani will be available for occupancy on May 1, 2009, then you may use your points for a stay that begins on or after May 1, 2009. (I don't know if May 1 is the actual date, I'm just using it for illustrative purposes).
If you are booking a non-home resort, you may call to make the reservation 7 months prior to your planned check out date. For May 2009 reservations, the 7 month window opens in October, 2008.