It is very important to allow Hendersons Group Investments to have your weeks as soon as you know you won't need them. In most vacation ownership programs, you need to use your weeks before the end of the calendar year to prevent them from expiring. There are also different seasons to the travel year. For example, you'll generally get a greater rental return in the winter months than in the summer months. Hendersons Group Investments has many programs, such as off-season corporate conventions, to get a greater return in the shoulder and summer months, but it is always in your best interest to allow us to have the weeks for rent before October 31st of the previous calendar year.