Hi. We have a timeshare with Allegro and you do not own a specific week. Instead you can choose your week. Ours is good for any week between May 15 and December 15th. This is great because it gives some flexibility on when you can go based on what else is going on in your life, like work vacations. Also, when school is out, you can take the kids, or when school is in, you can go without the kids and enjoy the less crowded beaches. The only thing is if you really want a specific week, you need to call early as rooms are limited.