Why the Most Magical Week of the Year Sells Out First — And How to Secure Your Dream Holiday Early Christmas week is the single most requested time of the year for yacht charters in the San Blas Islands. Between perfect weather, holiday reunions, and the desire to escape the winter cold, it’s no surprise that catamarans get booked out months in advance. If you’re considering a tropical Christmas surrounded by turquoise waters and palm-fringed islands, planning ahead is essen