I called MS today Aug 14, to change our reservation from the Beach Club to the BW for March 14, I thought today was the first day of our 7 month window. But they told me that Aug 15 would be the 7 month window and was the day that I needed to call to change the reservation, that it runs a day behind. Is this correct? I know that this may be a basic question that I can read in the member book but I am at work and don't have the book with me. Thank you for your help.